p k
DESCRIPTION
N. P K. S Ca Mg. Fe. B Cl Cu Mn Mo Zn. Essential Turfgrass Nutrients. Nitrogen. Organic Matter (O.M.) Fertilizers. Nitrogen Requirements. GrassLbs. N/1,000 ft 2 /Yr Common bermuda4 - 5 Hybrid bermuda5 - 6 - PowerPoint PPT PresentationTRANSCRIPT
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N
P K
SS
Ca Mg
FeFe
B Cl Cu Mn Mo Zn
Essential Essential Turfgrass Turfgrass NutrientsNutrients
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NitrogenNitrogen Organic Matter Organic Matter
(O.M.)(O.M.)
FertilizersFertilizers
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Nitrogen RequirementsNitrogen RequirementsGrassGrass Lbs. N/1,000 Lbs. N/1,000
ftft22/Yr/Yr
Common bermudaCommon bermuda 4 - 54 - 5Hybrid bermudaHybrid bermuda 5 - 65 - 6St. Augustine (Sun)St. Augustine (Sun) 3 - 43 - 4St. Augustine (Shade)St. Augustine (Shade) 2 - 32 - 3ZoysiaZoysia 2 - 32 - 3Tall FescueTall Fescue 3 - 43 - 4BuffalograssBuffalograss 1 - 21 - 2CentipedegrassCentipedegrass 1 - 21 - 2
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Nitrogen SourcesNitrogen Sources
Soluble NitrogenSoluble Nitrogen
Slow Release NitrogenSlow Release Nitrogen
Organic NitrogenOrganic Nitrogen
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Soluble Nitrogen Soluble Nitrogen SourcesSources
UreaUrea
Ammonium SulfateAmmonium Sulfate
Potassium NitratePotassium Nitrate
Ammonium NitrateAmmonium Nitrate
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Slow ReleaseSlow ReleaseNitrogen SourcesNitrogen Sources
Urea — formaldehyde (UF)Urea — formaldehyde (UF)
Isobutylidene diurea (IBDU)Isobutylidene diurea (IBDU)
Sulfur coated urea (SCU)Sulfur coated urea (SCU)
Polymer coated nitrogenPolymer coated nitrogen
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Organic FertilizerOrganic Fertilizer
A material containing carbon A material containing carbon and one or more elements other and one or more elements other than hydrogen and oxygen than hydrogen and oxygen essential for plant growthessential for plant growth
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Example: Natural Based FertilizerExample: Natural Based FertilizerChuck’s GreeneryChuck’s Greenery 100% Natural Based Fertilizer100% Natural Based Fertilizer
14 - 2 - 414 - 2 - 4 81% Natural Organic 81% Natural Organic
7% Natural Inorganic (Mineral)7% Natural Inorganic (Mineral)
Per 100 lbs. by WeightPer 100 lbs. by Weight % of the Nutrients% of the Nutrients
12 lbs. Urea12 lbs. Urea 40% of the N40% of the N54 lbs. Feather Meal54 lbs. Feather Meal 50% of the N50% of the N
12 lbs. Blood Meal12 lbs. Blood Meal 10% of the N10% of the N
15 lbs. Bone Meal15 lbs. Bone Meal 100% of the P100% of the P22OO55
7 lbs. Sulfate of Potash7 lbs. Sulfate of Potash 100% of the K100% of the K22OO
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Factors AffectingFactors AffectingNutrient AvailabilityNutrient Availability
Oxidation = reduction state of the nutrientOxidation = reduction state of the nutrient FE FE +2+2, Fe , Fe +3+3
Concentration of the nutrientConcentration of the nutrient Water content of soilWater content of soil OxygenOxygen TemperatureTemperature pHpH
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NitrificationNitrificationNHNH44
++ + O + O22 NONO22--
NONO22 + O + O22 NONO33--
Concentration of the nutrientConcentration of the nutrient Water content of soilWater content of soil OxygenOxygen TemperatureTemperature pHpH
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Nitrate (NO3-) is lostNitrate (NO3-) is lostfrom soil by:from soil by:
LeachingLeaching Soil microorganismsSoil microorganisms Taken up by grassTaken up by grass DenitrifiedDenitrified
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DenitrificationDenitrificationNONO33
-- NONO22-- NN22OO NN22
Occurs under the following conditions:Occurs under the following conditions:
Low oxygen concentrationLow oxygen concentration High soil moistureHigh soil moisture Alkaline soilsAlkaline soils High temperaturesHigh temperatures
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