1. http://homepages.which.net/ ~fred.moor/soil/links/l01.htm

The World آن نام كه سايت اين درWide Soil Jumpstation Linksاست link

( برايlink 200 دودح رد) زيادي هاي با مرتبط سايتهاي به اتصال

شامل و دارد وجود خاكشناسي خاك، فيزيك مختلف زمينه هاي خاك، آلودگي و شيمي خاك، بيولوژيً زمينه هاي ديگر و خاك مديريت كامالاست. خاكشناسي با مرتبط

2. http://www.asssi.asn.au/ انجمن به مربوط سايت اين

كه است استراليا كشور خاكشناسي انجمن اين معرفي بر عالوه آن در

خاكشناسي با مرتبطlink تعدادي رشته داراي دانشگاههاي مانند

خاك بخش همچنين و خاكشناسي معرفي نيز استراليا كشاورزي وزارت

شده اند.

3. http://www.msue.msu.edu/msue/imp/modf1/masterf1.html

دانشگاه در وب صفحات بين در به سايتي امريكا ميشيگان ايالتي & Soils آن عنوان كه مي خورد چشم

Soil Management - Fertilizer و است زمينه هاي در مفيدي اطالعات داراي

است. شيميايي كودهاي مختلف Soil nitrate زمينه هاي در اطالعاتي

testing، Soil acidity، Salt index، Fertilizer split applications، Fertilizer management

به مربوط زمينه هاي از ديگر وبسياري در خاك در شيميايي كودهاي كاربرد

است. دسترسي قابل سايت اين

4. http://www.agric.uwa.edu.au/soils/soilinks.html

دپارتمان به مربوط كه سايت اين در غربي استرالياي دانشگاه خاكشناسي

زمينه هاي در مفيدي هايlink استاست. شده ارائه آب و خاك مختلف

5. http://cms.lanl.gov/ Clay سايت به مربوط آدرس اين

Minerals Societyكاني هاي انجمن يا بر عالوه سايت اين است. در رسي

امكان مذكور انجمن معرفي جورنال مقاالت خالصه به دسترسي

Clays and Clay Minerals، اين انتشارات ) مباحثه گروه معرفي انجمن،

Discission groupمعرفي همچنين ( و اين با مرتبط علمي كنفرانسهاي

مي گيرد. صورت خاكشناسي از رشته6. ANTAS Molecular Modeling

Research Group Application of molecular modeling to soil and clay chemistry

7. Australian Clay Minerals Society 8. British Society of Soil Science 9. Canadian Society of Soil Science

(CSSS) 10. Ceramics and Industrial Minerals 11. European Soil Bureau 12. The International Committee on

Natural Zeolites--ICNZ 13. International Society of Soil Science

(ISSS) 14. International Soil Reference and

Information Centre 15. Italian Association of Pedologists

(AIP) 16. Mineralogical Society of Great Britain

& Ireland 17. Clay Minerals Table of Contents 18. Mineralogical Magazine Table of

Contents 19. Macaulay Land Use Research Institute 20. Office of Arid Land Studies

University of Arizona 21. Soils of Arid Regions of the U.S. and

Israel

22. SCIENCES of SOILS Online Journal for the Soil Sciences

23. S&S Discussion Groups e.g., Allophane transformation, Cyber Soils (Science and Teaching)

24. Soil Science Society of America (SSSA)

25. Soil Science Society of Ireland (SSSI) 26. Swedish Society of Soil Science 27. USDA Natural Resources

Conservation Service (URCS) 28. USDA National Soil Survey Center

29. http://link.springer.de/link/service/journals/10112/

Online Journal of به مربوط سايت اينthe Soil Scienceچكيده و است. عناوين

جورنال اين در شده منتشر مقاالتمي باشد. دسترسي قابل

30. http://www.pedosphere.com/ً سايت اين در كتاب يك عمال

مختلف فصلهاي داراي كه خاكشناسي خصوصيات آب، و خاك خاك، اهميت

مي باشد …و خاك شيميايي و فيزيكياست. شده ارائهonline بصورت

31. http://www.waite.adelaide.edu.au/Soil_Water/links.html

دپارتمان به متعلق وب آدرس اين آداليد دانشگاه خاكشناسي

معرفي ضمن آن در و استرالياست به مربوط كه زير هايlink دپارتمان،

دپارتمان هاي از قابل توجهي تعداد و اروپا دانشگاههاي خاكشناسي

است. شده ارائه است امريكا32. Helsinki University, Mycorrhiza

Research Group 33. University of Aberdeen, Department

of Plant & Soil Science,

34. University of Amsterdam, Department of Physical Geography and Soil Science

35. University of Arizona, Department of Soil, Water and Environmental Science

36. University of Bayreuth Germany, Department of Soil Physics

37. Cornell University, Soil, Crop and Atmospheric Sciences

38. University of East Anglia, Soil Micromorphology Centre

39. University of Florida, Soil and Water Science Department

40. University of Gent, Belgium, Laboratory of Soil Science

41. The University of Georgia, Department of Crop and Soil Sciences

42. Ggen Institute of Soil Sciences, Germany

43. Unive ottin rsity of Hawaii-Manoa, Agronomy and Soil Science

44. Japan (not sure where),Department of Plant Protection and Soil Science

45. KING MONGKUT'S INSTITUTE OF TECHNOLOGY LADKRABANG, THAILAND

46. The Soil Science Department University of Massachusetts, Department of Plant and Soil Sciences

47. Massey University NZ, Department of Soil Science

48. Michigan State University, Department of Crop and Soil Sciences

49. University of Minnesota, Department of Soil, Water and Climate.

50. Mississippi State University, Plant and Soil Sciences

51. University of Missouri, Department of Soil and Atmospheric Sciences

52. North Carolina State University, Department of Soil Science

53. North Dakota State University, Department Of Soil Science,

54. Nova Scotia Agricultural College, Chemistry & Soil Science Department

55. Oregon State University, Crop & Soil Science Home Page

56. Purdue University, Soil & Environmental Science Graduate Studies

57. University of Reading, Department of Soil Science

58. Rothamstead, Soil Science Department

59. South Dakota State University, Soil and Water Sciences,

60. Southern Illinois University at Carbondale, Plant and Soil Science

61. Texas A&M University Soil and Crop Sciences

62. Utah State University, Plants, Soils, and Biometeorology

63. University of Vermont, Plant and Soil Science Department

64. Virginia Tech, Crop and Soil Environmental Sciences

65. University of Wageningen, Department of Soil Science and Plant Nutrition

66. Washington State University, Department of Crop and Soil Sciences

67. University of Wisconsin, Department of Soil Science University of Wyoming, Deptartment of Plant, Soil and Insect Sciences

68. Helsinki University, Mycorrhiza research group

69.

70. http://www.bsyse.wsu.edu/saxton/soilwater/soilwater.htm?40,209

داشتن با مي توان سايت اين در تعيين بر عالوه رس و شن درصدهاي

بافت مثلث اساس بر خاك بافت درصد قبيل از نيز كلي اطالعات خاك،

رطوبت درصد خاك، اشباع رطوبت زراعي، ظرفيت و پژمردگي نقطه غيره و خاك ظاهري مخصوص وزن

آورد. بدست71. http://gnv.ifas.ufl.edu/~fairsweb/

text/ss/19827.htmlTechnical publication - This manual has been designed as a reference source for county

extension laboratories offering soil pH and/or electrical conductivity tests to their clients. This manual, if followed, will assist county faculty in assuring that these laboratory measurements are done correctly with high quality assurance.

72. http://www.bsyse.wsu.edu/~saxton/ saxton/grphtext.htm

This is an interactive page where you can enter the percentages of sand and clay in your soil, and have it classified online. Its free and fun. Try it out.

73. http://www.fh-osnabrueck.de/haste/ fbaw /bw/faosoil.htm

FAOSOIL, Version 2. This is a Computer programme for analysing your soil

74. http://www.carleton.edu/ curricular/GEOL/classes/ geo258 / titlereferencepage.html

Papers produced by soil science students. Topics vary from year to year

75. http://www.bgs. ac .uk/ The British Geological Survey is the UK's national centre for earth science information and its foremost supplier of geoscience solutions. It acquires and maintains up-to-date knowledge of the UK and its continental shelf by means of systematic geological, geophysical, geochemical, hydrogeological and geotechnical surveys underpinned by high quality research.

76. http://info.er.usgs.gov/ USGS is a world leader in the natural sciences through our scientific excellence and responsiveness to society's needs. Our Mission is to serve the Nation by providing reliable scientific information to: describe and understand the Earth; minimize loss of life and property from natural disasters; manage water, biological, energy, and mineral resources; and enhance and protect our quality of life.

77. http ://agcwww.bio.ns.ca/ GSC Atlantic is: the principle marine geoscience facility in Canada; a division of the Geological Survey of Canada )GSC(; co-located at the Bedford Institute of Oceanography, with the Department of

Fisheries and Oceans; a part of an Atlantic Provinces marine research and technology community centred in the Halifax-Dartmouth metropolitan region of Nova Scotia; a team of 80 specialists in marine and petroleum geology, geophysics, geochemistry, and geotechnology; a source of integrated knowledge and advice on marine geoscience, with specific concentration on Canada's coastal and offshore landmass

http://www.statlab.iastate.edu/soils/keytax/78. Soil classification or taxonomy US Department of Agriculture - Keys to Soil Taxonomy, Eighth Edition, 1998

http://gnv.ifas.ufl.edu/~fairsweb/text/ss/19825.html79. Key to soil orders in florida This fact sheet is intended for anyone who has some understanding of Soil Taxonomy but who needs a simplified key to help distinguish one soil order from another.

http://quarles.unbc.ca/nres/soc/about.html80. Canadain soil homepage Canadian classification system

http://quarles.unbc.ca/nres/soc/about.html81. Soils of arid regions of the United States

and IsraelPapers on soils of arid regions, how they develop, and how they are classified, with copies in Hebrew. In addition, there is a book chapter on managing soils for sustainable land use and a glossary of terms.

http://www.gsf.de/UFIS/ufis/thesaur/soil.html82. FAO - Soil unit classification scheme Germany - Soil Unit Classification Scheme

http://web.missouri.edu/~soilwww/scl.html83. Soil Characterization Laboratory The soil characterization laboratory was established in 1986 with funds from the Missouri Department of Natural Resources. The primary purpose of the lab is to characterize the soils from each county in Missouri. The characterization procedure

involves a detailed soil description by USDA-Natural Resource Conservation Service technicians and a quantitative analysis of both the physical and chemical soil properties. The final output is compiled into 'Soil Surveys' for each county-an invaluable tool for farmers and land-use managers. A secondary mission is to provide lab experience to students in the natural sciences.

84. Soil-forming minerals and rocks Soil is primarily the result of disintegration and decomposition of the minerals contained within rocks. The kind of soil and its nutrient status found in a given locality is a function of the material from which it weathered, referred to as 'parent material' of the soil. You can begin to appreciate the importance of geology to the study of soil. The purpose of this lab is to provide an understanding of weathering processes.

85. Formation and weathering of soils The Effects of Grazing and Trampling Behaviors of Large-Sized Livestock on the Formation and Weathering Patterns of Soils

86. The Mechanisms and effects of frost heave

Frost heave is the increase in volume experienced by soils when they freeze. Water moves to the upper horizons from below; when it freezes it forms segregated ice lenses which push apart the soil around them as they grow, causing the observed volume increase. Frost heave has a number of effects upon the soil and upon structures supported by the soil which make it an important process to understand.

http://pubpages.unh.edu/~harter/1-WEATH.html87. Rocks and soil formation

Rock chemistry

http://syllabus.syr.edu/esf/rdbriggs/for345/labtext05.htm88. Bulk density and pore space

I want to guide you through an exposition of bulk density and pore space, and how texture and structure may affect these soil properties. First I'll make some remarks on bulk density and pore space relationships, then you'll go to the laboratory bench for several demonstrations, and then I'll review

some points here that may help to clarify some of the information. Finally, you'll have some questions to answer, and calculations to make.

http://www.agso.gov.au/90. Australian geological survey

The Australian Geological Survey Organisation )AGSO( is Australia's national geological research and survey agency. It is a research agency within the Industry, Science and Resources portfolio and aims to achieve enhanced potential for the Australian community to obtain economic, social and environmental benefits through the application of first class geoscientific research and information.

91. http://www.gsf.fi/estonia/esthome.html

Geological survey of EstoniaThe Geological Survey of Estonia was founded in 1937 as the Geological Committee and was abolished by the Soviet power in 1940. In 1957 the Board of Geology and Protection of Mineral Wealth )the Geological Survey( was founded at the Council of Ministers of the Estonian S.S.R. Since its foundation the Geological Survey has mainly been engaged in researches of practical trend. The last time it has been reorganized and changed more scientific.

92. http://128.171.125.23/HIsoils/HIsoils.html

Soils of HawaiiThe application of soil survey and classification from the University of Hawaii

93. http://quarles.unbc.ca/nres/soc/soc.htm

Soils of CanadaSoils of Canada Home Page is a collection of selected soil profiles representing the Great Groups within the Canadian System of Soil Classification. The properties for each Great Group are briefly described including soil profile description.

94. http://www.bgr.de/b2/br_post.jpgSoil map of GermanyA map

95. http://www.statlab.iastate.edu/soils/hydric/

Hydric Soils of the United StatesUSDA-NRCS Soils Survey Division. - The definition of a hydric soil is a soil that formed under conditions of saturation, flooding or ponding long enough during the growing season to develop anaerobic conditions in the upper part.

96. http://syllabus.syr.edu/esf/rdbriggs/for345/soilsurv.htm

Soil mappingThis lab illustrates some basic concepts of soils as individual components of the landscape. Soils occur as natural bodies that may be mapped. Finally, soil interpretations for various uses, as well as some problems involved with the interpretation process will be discussed.

97. http://edcwww.cr.usgs.gov/glis/hyper/guide/world_soil

Zobler world soils data setThe World Soil data set was compiled from the FAO Soil Map of the World by L. Zobler )1986(. The major components of the data set are soil classification, soil texture, soil slope and a file reconciling the differences between Matthew's Global Vegetation Data Set and FAO sources. The resolution of the data is one degree latitude by one degree longitude.

98. http://web.missouri.edu/~soilwww/duleymiller.html

Duley-Miller Erosion PlotsUniversity of Missouri-Columbia - In 1917, Dr. Fl. L. Duley and Dr. M. F. Miller established seven test plots for the purpose of measuring erosion. The work led to the formation of the United States Conservation Service and development of the Universal Soil Loss Equation.

99. http://www.isric.nl/ISIS.htmISRIC Soil Information System (ISIS)When ISRIC was established as International Soil Museum in 1966 its main objective was to assemble soil monoliths, soil samples and associated information to illustrate the units of the FAO-Unesco Soil Map of the World. At present, the reference soil collection consists of over 900 monoliths from 64 countries. This is accompanied by soil profile and environmental data. In addition, the collection is supported by a soil map collection, soil report library and a slide collection.

100. http://www.itc.nl/~rossiter/research/rsrch_ss_class.html

A Compendium of On-Line Soil Survey InformationWhen mapping soils, we can record individual properties at each observation point. We soon discover, however, that sets of properties co-vary, and that we can recognise classes of soils.

101. http://res.agr.ca/CANSIS/NSDB/LPDB/faotext.html

Soil textureTexture is the relative proportion of sand, silt and clay of the dominant soil for each soil map polygon.

102. http://syllabus.syr.edu/ESF/RDBRIGGS/FOR345/labtext03.htm

103. Soil texture and structure Soil texture determination requires about three hours of lab time to complete - you will work in teams of three individuals. To make the most efficient use of your time prepare the soil sample for analysis and make the initial hydrometer reading.

104. Soil texture Aspects of clay and aggregation

105. Determination of the plastic limit and plasticity index for soil

The plastic limit is that moisture content of a soil at which it becomes too dry to be plastic, used together with the liquid limit to determine the plasticity index which when plotted against the liquid limit on the plasticity chart enables the classification of cohesive soils.

106. http://rhizo.cit.cornell.edu/rhizobotany/Freitas.html

Soil aggregate size and densityCornell University

107. http://www.agri.upm.edu.my/jst/resources/as/om_toc.html

Aggregate stabilityIts relation to organic matter constituents and other soil properties

108. http://www.carleton.edu/curricular/GEOL/classes/geo258/studentswork/Ekdahl.html

Factors of soil aggregationThere are many features that characterize a soil. One such feature is aggregates. There are many different types of aggregates, such as platy, prismatic, granule, blocky, angular, and more. There are several different factors which influence the formation of these aggregates.

109. http://www.carleton.edu/curricular/GEOL/classes/geo258/studentswork/Dickens.html

Story of organic matter decay in soilsTo most people, humus is a garlic-y chickpea spread for sandwiches or pita bread. However, to soil scientists, its something entirely different. Soil humus is a mixture of dark, colloidal organic compounds relatively resistant to decomposition. These compounds result from the decay of organic litter and accumulate in the O and A horizons of soils. Soil humus helps glue mineral particals into aggregates, giving structure to the soil and affecting soil stability.

110. http://www.ar.wroc.pl/~weber/humic.htm

Soil humic substances and humusAgriculturist since ancient times have recognized significant benefits of soil organic matter )SOM( to crop productivity. These benefits have been the subject of controversy for centuries and some are still debated today.

111. http://www.cals.cornell.edu/dept/flori/growon/media/organic.html

Peat and organic growing mediaCornell - The major types of organic media used in container-crop horticulture are peat moss, spent mushroom compost, and bark. Other organic and inorganic additives are also often added to these media

Soil analysis and testing112. http://hubcap.clemson.edu/

~blpprt/bobweb/bobweb.htmlBob Lippert - AnalysisThe following is a listing of questions I have been frequently asked during my past 15 years with the Clemson University Extension

Service. To find the answer, simply click on the appropriate question.

113. http://bluehen.ags.udel.edu/deces/prod_agric/title-95.htm

Recommended soil testing proceduresfor the North Eastern United States- Agricultural Experiment Stations of Connecticut, Delaware, Maine,Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, and West Virginia

114. http://www.ces.ncsu.edu/nreos/forest/xmas/ctn_025.html

Soil testing and interpretation of resultsFor christmas tree plantations, North Carolina - A well-planned fertilization program begins with a soil test and proper interpretation of the analysis. The following provides general guidelines for obtaining soil samples, a summary of soil test results and information for evaluating those results to develop an efficient Christmas tree fertilization program.

115. Soil testing and fertility Ontario currently uses about 1,000,000 tonnes of fertilizers annually. High yields can be produced efficiently only when fertilizer use is related to the fertility level of the soil and to other additions of nutrients in manure, crop residues, etc. At one extreme, on very low fertility soils, it is occasionally profitable to add as much or more nitrogen, phosphorus, or potassium in the fertilizer as a crop removes. At the other extreme, on high fertility soils or following heavy application of manures, fertilizer may not be profitable and occasionally may reduce yields.

116. http://www.cahe.nmsu.edu/pubs/_a/a-122.html

Soil test interpretationsNew Mexico State University - A soil test can be an important management tool in developing an efficient soil fertility program, as well as monitoring a field for potential soil and water management problems.

117. http://gnv.ifas.ufl.edu/~fairsweb/text/ss/19827.html

Soil testingTechnical publication - This manual has been designed as a reference source for county extension laboratories offering soil pH and/or electrical conductivity tests to their clients.

This manual, if followed, will assist county faculty in assuring that these laboratory measurements are done correctly with high quality assurance.

118. http://itsd-s3.agric.gov.ab.ca/agdex/500/4100001j.html

Soil testing and sampling guideAlberta - Soil testing has become an important tool for assessing soil fertility and arriving at proper fertilizer recommendations. it is also a valuable management aid for studying soil changes resulting from cropping practices and for solving specific cropping problems.

119. http://www.soils.wisc.edu/extension/soillabs.html

Soil and plant analysis laboratoryThe University of Wisconsin offers a wide range of diagnostic services including soil, plant, and forage analysis. The laboratories provide testing services and technical support for University researchers and the general public.

120. http://www.msu.edu/user/guilherm/esc.htm

Soil ChemistryLinks related to environmental soil chemistry

Soil chemistry - general 121. http://www.msue.msu.edu/msue/

imp/modf1/modf1s.htmlSoil chemistry Michigan State University - salt and nutrient recommendations

122. http://pubpages.unh.edu/~harter/soil702.html

Soil Chemistry and its applicationsThe aim is to facilitate a basic understanding of soil chemical reactions and how the soil relates chemically with the environment.

Soil fertility and nutrients 123. http://www.msue.msu.edu/msue/

imp/modf1/masterf1.htmlKey letter soil fertility searchMichigan State University. Try this first it's good!

124. http://www.ag.uiuc.edu/~robsond/solutions/horticulture/soils.html

Soils and FertilizersUniversity of Illinois - Soils and Fertilizers - Details about just about every plant food you can imagine

125. http://www.soils.umn.edu/academics/classes/soil3125/doc/lab9fert.htm

Soils and fertiliser informationUniversity of Minesota. - General Objective: To acquaint the student with fertilizer terminology and the use of chemical determinations to make fertilizer recommendations

126. http://ozone.crle.uoguelph.ca/manure/menu.html

Soil testing and fertilityOntario - lots of information

127. http://res.agr.ca/manurenet/manurenet.html

Manure Net Canada.A Canadian Web Site Dedicated to Manure Management

128. http://spectre.ag.uiuc.edu/archives/experts/fertility/

Soil Fertility ManagementAsk a question about soil fertility management and get it answered

129. http://www.cco.caltech.edu/~aquaria/krib/Plants/Fertilizer/

Soil and substrate fertilizersFor aqatic plants - This section contains information on macro and micro-nutrients. )CO2 is discussed elsewhere. For related information on nitrates and other chemistry, see also the general chemistry section.

130. http://www.maasnursery.com/organictechniques.htm

Organic gardening techniquesThe success or failure of the organic approach depends on how gardeners use and prepare organic matter. Organic matter improves soil tilth and prevents soil compaction and crusting. It increases the

water holding ability of the soil and provides a more favorable soil environment for earthworms and beneficial microorganisms.

131. http://www.tfrec.wsu.edu/summary/FJP.html

Orchard soil managementDeciduous fruit tree nutrition - Deficiencies of micronutrients frequently occur in Washington orchards. Zinc and boron deficiencies are the most common and are controlled by regular use of zinc and boron fertilizers.

132. http://www.gpsr.colostate.edu/GPFARM/soilmntr.htm

Soil management - nutrientsColorado

133. http://www.cals.cornell.edu/dept/flori/growon/field.html

Nutrient management of field cropsCornell USA - Nutrient Management Is a Vital Part of Successful Field Nursery Crop Production.

134. http://www.cals.cornell.edu/dept/flori/growon/containr/

Nutrient management of crops in containersCornell USA - This set of web pages describes the nutrients needed by nursery crops, the particular challenges associated with growing nursery stock in containers, and strategies for addressing the nutrient demands of woody ornamental plants

135. http://www.aginfonet.sk.ca/agricarta/html/t_soils2.html

An Introduction to Organic FertilizationOrganic Crop Production lots of information - Lots of information

136. http://www.msue.msu.edu/msue/imp/modf1/modf1n.html

Nitrogen fertilisersMichigan State University

137. http://www.agr.gov.sk.ca/land_wat_clim/soil/Scn0395.asp

Nitrogen fertilization in crop productionSaskatchewan - Applying more nitrogen )N( generally means more grain, up to the point

where some other factor )moisture, phosphate, genetic potential, etc.( limits yield.

138. http://www.gov.on.ca/OMAFRA/english/crops/facts/90-201.htm

Nitrogen fertilizer materialsOntario - For field crops. Nitrogen is one of sixteen elements that are essential for the growth of plants. It is a component of proteins and is therefore involved in regulating most processes that occur in plants.

139. http://www.agr.gov.sk.ca/land_wat_clim/soil/Phosfert.asp

Phosphorus fertilization in crop productionSaskatchewan - Phosphorus )P( is essential for plant growth and is required in large amounts by plants. P fertilizer is needed on about 85% of Saskatchewan cropland.

140. http://www.ianr.unl.edu/pubs/Soil/g601.htm

Using phosphorus fertilizers effectivelyFor most effective use of phosphorus, the fertilizer needs to be placed to ensure quick contact by growing roots and minimal contact with the soil.

141. http://www.gov.on.ca/OMAFRA/english/crops/facts/97-005.htm

The Phosphorus & Potassium soil testing and fertilizer recommendation systemOntario, Canada - The Ontario soil testing and fertilizer recommendation system for Phosphorus )P( and Potassium )K( has a scientific basis as strong as any soil testing program in North America and stronger than most.

142. http://www.msue.msu.edu/msue/imp/modf1/modf1p.html

Potassium fertilisersMichigan State University

143. http://www.gov.mb.ca/agriculture/crops/cropproduction/faa04s00.html

MicronutrientsMost soils are adequately supplied with micronutrients, such as boron, copper, cobalt, iron, manganese, molybdenum and zinc. Micronutrients are likely to limit yields only under very specific soil and crop situations. Diagnose micronutrient deficiencies with the following procedures:

144. http://www.msue.msu.edu/msue/imp/modf1/modf1t.html

Minor chemicalsMichigan State University

145. http://www.danwinter.com/yarrow/b12coblt.htm

The B12-Cobalt ConnectionCobalt is important in the plant world. Bacteria on root nodules of legumes )beans, alfalfa, clover( require cobalt )and other trace elements( to synthesize B12 and fix nitrogen from air.

146. http://www.agri.upm.edu.my/jst/resources/as/om_feal.html

147. Iron and aluminum oxides Iron and aluminum ought to be the best cations to link the negative charged organic matter and the negative charged clay, but the problem is iron and aluminum tend to hydrolyze into a myriad of forms: polycations, hydroxides, oxyhydroxides and oxides 148. Fertiliser Deficiencies

Michigan State University149. Fertiliser materials

Nitrogen fertilizer materials are available in dry or liquid forms. Although there are some limitations to use of these materials )see section, Toxicity of Fertilizer Materials(, in most cases the different sources will produce equal yields. The farmer's choice of material should therefore depend on availability, equipment for handling, and cost per kilogram of nitrogen, plus the cost of application.150. Controlling soil fertility

Approximately 2 billion hectares of land, 17% of the total vegetated area of the earth has been degraded for agricultural purposes since 1945 )Oldeman et al., 1990(. Oldeman et al. )1990( classify about half of this degraded area as still permitting agricultural use, but with greatly reduced productivity151. Soil fertility considerations for land

Bringing CRP land back into production should be similar to cropping previously hayed or pastured ground. Haying or grazing land will remove nutrients and, without fertilization, reduce nutrient levels. The duration of CRP and whether it was hayed influences soil fertility status. 152. Forest fertilization guidebook

British Columbia - This guidebook has been prepared to assist forestry practitioners in meeting the requirements of the Forest

Practices Code with respect to the safe and efficient, broadcast application of fertilizer. 153. Manure Use

British Columbia - Manure is a by-product of all animals. Manure has value as both a soil conditioner and a source of nutrients )nitrogen, phosphorus, potassium(. The nutrient value of manures varies, depending on the type and age of the animal )beef cow, dairy cow, calf, finisher pig, broiler, layer, etc.(, the nutrients in the animal feed, and the manure collection, storage and spreading method used.154. Fertilizers and their effective use

International Fertiliser Association - Fertilizers are substances that supply plant nutrients or amend soil fertility. They are the most effective means of increasing crop production and of improving the quality of food and fodder. With them, food for more people can be produced than this planet would otherwise support.155. Fertilisers and sugar beet

Sugarbeet Research and Education Board, North Dakota

Soil acidity and pH and liming 156. Fertilization and liming

Florida Agricultural Information157. Soil acidity

Ontario - The pH scale ranging from 0 to 14 is used to indicate acidity and alkalinity. A pH value of 7.0 is neutral; values below 7.0 are acid and those above 7.0 are alkaline. Most field crops grow well in a soil pH range from 6.0 to 8.0.158. The acidity of forest soils

Forest ecosystems are important both ecologically and economically. It is arguable that the most fundamental dynamic of the forest ecosystem is the forest soil. The acidity of forest soils can alter the chemistry, biota, and hydraulics of the soil, and thus, alter the soil formation characteristics and the soil composition. It follows that the acidification of forest soils demands a great deal of research and attention. 159. Soil acidity and liming

Ontario - The pH scale ranging from 0 to 14 is used to indicate acidity and alkalinity. A pH of 7.0 is neutral, values below 7.0 are acid, and those above are alkaline. The lower the pH the more acid is the soil. The higher the pH, the more alkaline.160. Cation exchange capacity

SUNY Environmental Science and Forestry - This lab deals with the attraction of cations to colloidal surfaces. First, the phenomenon of cation exchange will be introduced, with some additional information on its practical significance. Then I will cover some material

on flocculation and dispersion of clay, which is not covered thoroughly in your text. 161. Soil reaction

Chemistry of acidity in soil - We should first understand the source of the negative charges which attract the hydrogen ions of the soil. First and most obvious are the negative charges within the clay crystals due to isomorphic substitution. These charges are permanent, do not vary with change in pH, but do vary depending on the type of clay )recall the CEC exercise(. 162. Liming, fertilization, and soil testing

Soil Fertility Lab - Liming, fertilization, and soil testing163. Potentially beneficial effects from liming

Chemical and physical Lime may affect crops differently on temperate and tropical soils. ... The difference is not in whether crops respond to lime under both conditions but in what factors affect response to lime under each condition. 164. Understand your soil test: Sulfur

Factors leading to sulfur deficiency, soil and water tests, soil test interpretation and fertilizer materials that contain sulfur are covered here.

165. The Soil Foodweb It's Importance in Ecosystem Health. The structure and function of the soil foodweb has been suggested as a prime indicator of ecosystem health 166. Above grounder's introduction to

mycorrhizaYou have found the spot to get introductory information on mycorrhiza, the "other half of the root system." Go ahead and mouse your way through our Web site. 167. Microbiological activity in native soils

Most cultivated soils of the Great Plains have been tilled for 50 to 100 years. During this time, prairie soils have undergone major changes. Degradation of prairie soil occurs through erosion, loss of organic matter, salinization, and acidification. Digital learning center for microbial ecologyMicrobial ecology is the study of ecosystems that are entirely composed of or profoundly influenced by microscopic organisms. Unlike medical microbiologists, who study disease-causing microbes, microbial ecologists are often concerned with communities of microorganisms responsible for processes that are helpful to or sometimes essential for the health and survival of humans on Earth. 168. Ethylene Biosynthesis by Soil

MicroorganismsMy work with ethylene was done from about 1974 to 1980, so it goes back some years. It

was also quite controversial. Jim Lynch, working in the UK, had reported that ethylene production from soil came from fungi, especially Mucor species, using methionine as a substrate. 169. Collection of soil-borne fungi

The Plant Pathology Department does fundamental strategic and applied research on crop diseases caused by fungi, bacteria and viruses. 170. The Worm Page

The plow is one of the most ancient and most valuable of man's inventions; but long before he existed, the land was in fact regularly plowed and still continues to be thus plowed by earthworms. It may be doubted whether there are many other animals which have played so important a part in the history of the world, as have these lowly organized creatures.171. US Dept. of Interior Collaborative

Research UnitUniversity of Missouri-Columbia. The Field Station conducts the Ozarks Highlands Global Change Research Program )GC( and the Prairie Cluster Inventory and Monitoring Program )I&M(. These are the only two long-term ecological monitoring programs in the National Parks of the Midcontinent172. The Biodegradation of Oil by Aerobic

BacteriaNorth Carolina Biotechnology Center. an award-winning project demonstrating biodegradation of oil at the North Carolina Student Academy of Science competition. Jon had used inexpensive, readily available materials in a simple but effective procedure.

173. Soil management links site Great Plains, Colorado174. Key letter soil fertility management

searchMichigan - To use the data base, click on a letter to bring up a list of keywords that begin with that letter. Related topics will be listed under each keyword. Click on the topic to retrieve the associated information. You may also use the keyword search option.

Soil management 175. Soil management

University of Bangor Lecture Notes, )UK(176. Soil management - quality

Colorado, USA177. A Collection of papers on soil

managementThis is a huge list of papers on a wide variety of soil management topics

178. Soil management issues in a wet planting season

Yes. Ponding from excess water may be particularly troubling in terms of soil properties. Ponding creates a set of layers in the soil that appear very much like compaction in the soil and early root growth often follows the weaker path between these layers. The plants can have many of the problems that we associate with compaction from tillage or traffic. 179. Tillage options

Conventional tillage is any system which attempts to cover most of the residue, leaving less than 30% of the soil surface covered with residue after planting. Usually, the moldboard plow is used in conjunction with a variety of other tillage implements.180. Land management practices

Canada - One of Canada’s most valuable resources is the soil. A healthy soil — one that is able to accept, store, and cycle water, nutrients, and energy over a sustained period — is better able to produce food and fibre for the needs of Canadians and the world’s growing population181. Soil management practices

Sugarbeet Research and Education Board, North Dakota182. Effects of soil management practices on

earthwormsNew Zealand - The size of earthworm populations in soil fluctuates in response to changes in agricultural practices. Some of these management practices such as pasture improvement have been shown to encourage earthworms, whilst other practices like using soil fungicides can have very deleterious effects. 183. Sanborn Field

University of Missouri-Columbia - Sanborn Field was initiated in late 1888 by Dean J. W. Sanborn to demonstrate the value of crop rotations and manure in grain crop production. The field, located on the University of Missouri campus, has undergone several changes since 1888. This brochure outlines the latest of these changes which were put into full operation in 1991.184. Erosion Control Online

Official Journal of the International Erosion Control Association - Welcome! Want information related to the erosion control and sedimentation industries? Look no further! We're adding content daily, so come back often.

Soil compaction Soil compaction and drainageOhio - The volume of a typical cultivated silt loam soil is 50 percent soil particles, 30

percent water and 20 percent air. Of course, air and water content are constantly changing. An applied load that reduces the total volume causes compaction. Because the soil particles and water are relatively incompressible, compaction causes reorientation of soil particles and reduces the volume of air. This slows down water and air movement and reduces the water holding capacity of the soil.185. Soil compaction

University of Guelph, Ontario - The compaction of agricultural soils is a serious problem and growing concern in the agricultural community due to its potential to seriously reduce the productive capacity of crop land. In areas of the world where intensive, "mechanized" agriculture is practiced, soil compaction ranks highly with other forms of land degradation )e.g. soil erosion and salinization( as a major threat to sustaining current agricultural production levels.

Soil and water 186. Soil Water Management Strategies

Precipitation during the growing season is frequently insufficient to meet the needs of the crop. Management practices must ensure that the maximum available water is stored in the soil in the spring.187. Soil and water

University of Arizona - The Soil, Water, and Plant Analysis Laboratory )SWPAL( is a Service unit available to support research, extension, and instruction activities located in the department of Soil, Water, and Environmental Science, other departments within the College of Agriculture, and the University of Arizona at large.188. Soil water

In order to develop the soil moisture characteristic curves, two variables must be measured: soil moisture and soil water potential. Gravimetric soil moisture samples are obtained using a core sampler. Those cores are obtained using a drilling device. Individual cores are obtained from each desired depth in the profile.

top top Composting 189. The compost resource page

This site is intended to serve as a hub of information for anyone interested in the various aspects of composting. Composting ResourcesLinks to websites about composting 190. Composting at home

Iowa City - Composting is the controlled breakdown of biodegradable yard and kitchen wastes. Compost is generally dark in color,

resembles topsoil, and makes a useful soil conditioner. Success in composting depends upon sufficient moisture and oxygen as well as proper amounts of carbon and nitrogen. 191. Composting

The benefits and limitations of use as soil amendment. Composting is widely-known as an environmentally sustainable method of recycling food scraps and garden/yard clippings. According to the United States Environment Protection Agency's )EPA( 1994 report entitled, "Waste Prevention, Recycling, and Composting", food discards constitute approximately 8 percent of municipal solid waste generated nationwide. 192. How to compost

Easy reading. This how-to document contains information about composting fundamentals for those interested in an introduction to how composting should be done. In addition, a set of composting questions and answers provide information about how to tell if compost is finished, how to use compost, and how compost benefits the soil.

Container soils and issues 193. Recommended soil mixtures for potting

BonsaiSoil mixes should be comprised of three basic elements plus various addatives for specific requirements.194. Properties of container growing media

Cornell - Understanding the general characteristics of growing media, as well as the specific attributes of the media you are using, will enable you to get the most out of your nursery. This set of pages describes the attributes of media and how to manage media for success.

195. Texture Auto Lookup TAL is a script )previously called macro( that works within a spreadsheet to determine the soil texture class based on 4 soil classification schemes

Other general soil links and resources 196. Soils online

Soil resource page197. Soil science links

Adelaide, Australia, with links to other Australian and worldwide universities with soil connections198. Crops and soils library

Kansas State - Lots of links about farming and growing in Kansas

199. Agriculture/earth science link list with some soil links

Welcome! Here you will find over 1020 links to various web sites all over the world regarding information about soils and agriculture. 200. Database of web sites on soil.

WWW Virtual Library - Forestry - Soils and Substrates201. Soil science newsletters

Mostly a collection of technical papers202. Tektran Agricultural Research

Huge list with lots of topics203. The Pedosphere and Its Dynamics

A Systems Approach to Soil Science

Soil glossaries and descriptions 204. A glossary of soil terms

A very comprehensive glossary of soil terms205. Glossary of soil

Canada - Excellent )and long( hyperlink list of terms explained for you

top top General soil information 206. Introduction to Soil

Cranfield University - These pages offer the young student a brief overview introduction to soils and explain about the importance of soil. There are also some experiments at the end which you can try out.(an excellent site for beginners - FM) 207. Soils and their conservation

University of Adelaide - Sal is going to take you on a journey through our website )Don't forget to visit the Soils Zoo!(. To find your way around, use the mouse to click on the buttons on the left side of the screen in the pink frame. The blue and pink buttons will send you to information on soils in Australia.

208. Soil quality - information sheets USDA Natural resources conservation service209. A beginner's guide to soil quality

Easy Reading210. Understanding the soil processes

Most of us will agree that the soil is the major natural resource available to mankind. Yet it is and has been abused by us to the point of self destruction. Many past civilizations have perished due to their abuse of the soil )like Mesopotamia and the Mayan civilization(. 211. Soil health

Build healthy soil to promote crop-, livestock- and human health.212. Some basics on soil s

Color, Compaction, Moisture, Organics, pH, Profile, Structure, Temperature, Texture

213. The health of our soils Canada- Most people know that they need clean air and clean water to stay healthy. Fewer people realize that their well-being also depends on the health of another component of our environment -- the soil. Soil supports the growth of most of our food and fibre, so its productivity is a major factor in the economies of Canada and other nations. 214. Soil and crops

Florida

Miscellaneous soil information 215. Sensitive map for agribio research

University of Wolverhampton )UK(216. Soils and Crops Research and

Development CentreCanada - The Soils and Crops Research and Development Centre is part of the Agriculture and Agri-Food Canada Research Branch. The Branch, whose mandate is to improve the on-going competitiveness of the Canadian agriculture and agri-food sector through the development and the transfer of new technologies, operates 17 other similar research centres across the country and in every province. 217. Department of soil sciences

Swedish Univ. of Agric. Sciences - At the Department of Soil Sciences, research is carried out in six major fields: Environmental Physics; Hydrotechnics; Soil Management; Soil Fertility and Plant Nutrition; Soil Chemistry and Pedology; Water Quality Management 218. Environmental science research

informationMissouri - The purpose of this page is to provide a source of environmental science information. The primary topics included in this listing are forestry, soil science, and forest economics; however, the search tools make this site a perfect 'launchpage' to a variety of information sources. 219. National soil data access facility

National soil survey center, Lincoln, Nebraska. - The National Soils Data Access Facility )NSDAF( project is a multi-faceted effort that will provide a mechanism, for both internal and external customers, to access, analyze, download, and report the various national soils databases. 220. Minimize drought damage

Forest management strategies from North Carolina State University221. Soil micromorphology home page

It has been said that the light microscope has been the most important scientific instrument of all time. It is the tool of micromorphology. "Micromorphology is the branch of soil

science that is concerned with the description, interpretation and, to an increasing extent, the measurement of components, features and fabrics in soils at a microscopic level" 222. Table of contents for soils

Soil information from the University of Minnesota223. Modeling soil

Realtime dynamic models for soil slippage and manipulation. A physically based model of an object is a mathematical representation of its behavior, which incorporates principles of Newtonian physics. Dynamic soil models are required in animations and realtime interactive simulations in which changes of natural terrain are involved. 224. Biodiversity, soil and sustainable

developmentAustralia - The soil, as the major medium for plant growth, is the basic resource for all land use and development. Ecologically sustainable development is not feasible unless it includes, as a basic concept, the conservation and sustainable use of soils.225. Municipal composting

Cornell - The recent upsurge of interest in composting the organic fractions of municipal solid waste )MSW( builds on largely successful efforts with composting yard trimmings, agricultural wastes, and sewage sludges. While experience with these other materials is helpful in considering an MSW composting program, there are a number of challenges unique to MSW which need to be addressed. 226. Forest site preparation guidebook

British Columbia - Site preparation is any planned measure to prepare a site for the favorable reception and satisfactory growth of naturally disseminated seed, sown seed, or planted seedlings. This guide provides the reader with baseline information on the relationship between site preparation and the Forest Practices Code legislation. 227. NASIS: Soils data for natural resource

planningThe focus of the National Cooperative Soil Survey is shifting from producing static printed soil survey reports to providing a dynamic resource of soils information for a wide range of needs. The National Soil Information System )NASIS( is the core component of this vision and is designed to manage and maintain soil data from collection to dissemination. NASIS supports this conceptual shift in three important areas: 228. Septic systems and soil

Information about the effect of human waste on soil229. Drip irrigation and soil

Irrigation has had a substantial effect on agricultural history, from its use by Egyptian and Iranian farmers over 2500 years ago through modern agriculture )Troth 1980(. The most common irrigation techniques of today are furrow, flood, sprinkler and drip. Furrow and flood both flood the irrigated area, while sprinkler and drip are direct applicators. Drip irrigation is gaining popularity for its efficiency of irrigation.230. Weeds as Indicators of Soil Conditions

Could weeds really have some virtues, a beneficial side to their character? It seems unlikely. Well, yes, actually weeds do have some points, in their favour. 231. Weeds as Indicators of Lawn Problems

Weeds are just plants having to deal with an unhappy human. Weeds draw scorn, particularly in lawn areas. It is impractical to expect our lawns to be totally weed free all of the time. But according to Tom Voigt, U of I turf specialist, large numbers of weeds in a lawn can indicate certain problems such as:

232. The British Geological Survey The British Geological Survey is the UK's national centre for earth science information and its foremost supplier of geoscience solutions. It acquires and maintains up-to-date knowledge of the UK and its continental shelf by means of systematic geological, geophysical, geochemical, hydrogeological and geotechnical surveys underpinned by high quality research. 233. British Society of Soil Science

The aim of the British Soil Science Society is to raise both public and scientific community awareness of the importance of soil science. This is primarily achieved through the promotion of soil science related information in a wide variety of formats )books, journals, regional meetings, conferences, videos, internet etc(. Although you can find lots of details of these on this website, you will also find links to other soil-related teaching material, universities, institutes, other international plant and soil societies, publishers and chemical manufacturers. 234. Department of Soil Science

The Department of Soil Science at the University of Reading is the only University Department in the United Kingdom that is devoted solely to the study of soils. It was formally established in 1964, but its origins go back to the establishment of courses in agriculture at Reading in the late 19th Century. 235. Institute of Arable Crops Research

The Institute of Arable Crops Research )IACR( is a grouping of private organisations and is one of eight Institutes sponsored by the

Biotechnology and Biological Sciences Research Council. One site is also a Department of the University of Bristol and the others are owned by the Lawes Agricultural Trust )a charity and company limited by guarantee(. 236. Institute of Terrestrial Ecology

The Institute of Terrestrial Ecology will develop long-term, multidisciplinary research and exploit new technology to advance the science of terrestrial ecology, leading to a better understanding and quantification of the physical, chemical and biological processes of the land.237. Long Ashton Research Station

IACR - Long Ashton Research Station is one of the three sites forming the Institute of Arable Crops Research, the others being IACR - Rothamsted and IACR - Broom's Barn. The Research Station, sited a few miles to the west of Bristol, is also the Department of Agricultural Sciences of the University of Bristol. It offers post-graduate training, including a one year MSc course in Crop Protection, to students from the UK and abroad. 238. Soil Science Department

Rothamsted, UK239. School of Agricultural & Forest

SciencesUniversity of Wales, Bangor240. Soil Survey & Land Research Centre

Cranfield University, Bedford - The Soil Survey and Land Research Centre, SSLRC, is the leading independent organisation on soil resources in the UK. It conducts research, carries out consultancy, and offers a range of scientific services.

European organisations 241. European Topic Centre on Soil

Part of EIONET - European Environment Information and Observation Network

USA organisations 242. US Department of Agriculture

USDA Mission: Enhance the quality of life for the American people by supporting production of agriculture by: ensuring a safe, affordable, nutritious, and accessible food supply; caring for agricultural, forest, and range lands; supporting sound development of rural communities; providing economic opportunities for farm and rural residents; expanding global markets for agricultural and forest products and services; and working to reduce hunger in America and throughout the world. 243. Soil Science Society of America

Welcome to the Official Web Site for the Soil Science Society of America. The Soil Science Society of America )SSSA( is the professional home for over 6,000 professionals throughout the world dedicated to the advancement of soil science. The primary purpose of the Society is to advance the discipline and practice of soil science by acquiring and disseminating information about soils in relation to crop production, environmental quality, ecosystem sustainability, bioremediation, waste management and recycling, and wise land use. 244. National Society of Consulting Soil

Scientists, Inc.The mission of the National Society of Consulting Soil Scientists, Inc. is: To advance the discipline and practice of soil science by professionals; To promote quality interaction between professional soil scientists and their communities; To represent the diverse consulting, service and business interests of professional soil scientists; To facilitate the exchange of business and soil science experiences within the Society, and To foster professional and ethical conduct in the soil science discipline. 245. National Soil Erosion Research

LaboratoryThe National Soil Erosion Research Laboratory )NSERL( of the United States Department of Agriculture - Agricultural Research Service is the focal point for the U.S. Government's national research program in soil erosion by water. Major program thrusts of the NSERL include fundamental erosion process research, erosion control research, and delivery of improved erosion prediction technology. The NSERL is located on the campus of Purdue University )building labeled SOIL in south center of map( in West Lafayette, Indiana. 246. National Soil Tilth Laboratory

The mission of the National Soil Tilth Laboratory is to generate and integrate knowledge for the development and evaluation of management practices that enhance surface and ground water quality while ensuring the long term enhancement and conservation of the nation's soil and water resources. Multidisciplinary research teams conduct quantitative research on soil biological, chemical, and physical processes and their interaction as related to agricultural practices. 247. Soil analysis at Cornell

Cornell Nutrient Analysis Laboratories )CNAL( operates as a facility of Cornell Cooperative Extension )CCE(. CCE already provides a lot of information through its Web server. In having our own home pages, we aim to complement the CCE resources already available.248. University of Missouri-Columbia

Dept. of Soil & Atmospheric SciencesUS Geological surveyUS information about the Earth.249. World Soil Resources

The World Soil Resources Office of the USDA Natural Resources Conservation Service, Soil Survey Division is dedicated to collaborating with national institutions to help manage and conserve their natural resources, improve their abilities to attain sustainable agriculture, and enhance their capabilities to address problems of food security, income generation, and the environment.

International and other organisations 250. International Society of Soil Science

The ISSS, founded on 19 May 1924, is organized as a non- profit, non- governmental, scientific society. The ISSS is a scientific union member of the International Council of Scientific Unions )ICSU( since 1992. The purpose of the Society is to foster all branches of soil science and its applications, to promote contacts among scientists and other persons engaged in the study and the application of soil science, to stimulate scientific research and to further the application of soil research, for the benefit of mankind.251. International Permafrost Association

The International Permafrost Association, founded in 1983, has as its objectives fostering the dissemination of knowledge concerning permafrost and promoting cooperation among persons and national or international organizations engaged in scientific investigation and engineering work on permafrost. 252. International Fertiliser Association

Fertilizers and their effective useSoil Science Division,University of SydneyAustralia253. Division of Agronomy and Soil Science

This document introduces the Agronomy and Soil Science group, at the University of New England, Armidale, New South Wales, Australia. 254. Canadian Society of Soil Science

The Canadian Society of Soil Science )CSSS( is a non-governmental, non-profit organization for scientists, engineers, technologists, administrators and students involved in professional soil science. Its Objectives are: )1( to promote the wise use of soil for the benefit of all society, )2( to promote research and practical application of findings in soil science and )3( to promote information and technology exchange among people in professional soil science.

255. Canadian Sphagnum Peat Moss Association

Information about peat and sustainability256. Soils information from Ontario

Land, water and air resource management information257. Australian Society of Soil Science

The Australian Society of Soil Science Incorporated )ASSSI( was founded in 1955 to work towards the advancement of soil science in the professional, academic and technical fields, it comprises a federal council and seven branches throughout Australia.258. New Zealand Society of Soil Science

The New Zealand Society of Soil Science is a professional society to encourage the advancement of soil science. It was formed in 1952 and has over 400 local and international members.259. Geological Society of New Zealand

The Geological Society of New Zealand aims to encourage the advancement of geology in New Zealand. Membership is open to all who are interested in the earth sciences.

260. Analysis of soil physical properties Finnish Forest Research Institute - Charges for extension service261. Green Products

Greenproducts specialises in the development and production of plugs for raising youg plants in horticulture. The greenplug is a perfect growing system for your cuttings and seedlings.

USA Soil Businesses 262. BioVam® Mycorrhiza

"T&J Enterprises supplies BioVam Mycorrhiza, Organic fertilizers and related products for home lawns, gardens and commercial growers. BioVam Mycorrhiza naturally increases the health, vitality and quality of 90% of the earths plants and enriches your soil."263. Humate products

How to use Humisolve-USA™ on fruit crops and why it works so well264. Soil Search Labs.

Kennewick, Washington USA - Soil testing has become an important tool for assessing soil fertility and arriving at proper fertilizer recommendations. it is also a valuable management aid for studying soil changes resulting from cropping practices and for solving specific cropping problems.265. EarthCo

EarthCo is a professional soil testing company. We specialize in helping home

gardeners understand more about how to build and maintain healthy soils.266. Texas Plant & Soil Lab, Inc.

Texas. USA - Texas Plant & Soil Lab - an international leader in soil fertility and plant nutrition. Consulting and Soil, Water & Plant Analysis for conventional, sustainable or Organic growers. 267. Soil Technology,Inc

Washington USA. )Contaminant testing available(.268. Maxicrop seaweed extract

Organic plant stimulants and human and animal dietary supplements made from Norwegian Seaweed269. Welcome To Worm Heaven

Worm Supply Company and facts about worms and composts270. Top-Seal Liquid Soil Sealant and

StabilizerWe are the manufacturer of Top-Seal Liquid Soil Sealant and Stabilizer. Top-Seal is an environmentally safe soil stabilizer, dust and soil erosion control product.271. Harmony Products

Harmony sells the final product manufactured by the plants equipped with our technology. Various organic waste streams are stabilized and converted to safe, useable and effective fertilizer products.

International and Other Soil Businesses 272. Premier Horticulture

A complete line of High-Performance Growing Media, Planting Mixes and Soil amendments for both professionals and consumers. 273. Reme Soilmaster

)Australia( Soilmaster provides definitive advice and analysis for farmers and environment

274. http://www.ussl.ars.usda.gov/ MODELS/MODELS.HTM