getting to know your soil: easy tools to keep at...
TRANSCRIPT
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GIS AND MAPPINGWATER NUTRIENTS TESTING CHEMISTRY SOILS PLANTS
Getting to know your soil: Easy tools to keep at hand.
Joan R. Davenport WSU-Prosser
[email protected] http://css.wsu.edu/irrsoils/
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Outline of Presentation
• Identifying Your Soil
• Getting a “Feel” for your Soil
• Soil Sampling and Testing
• Soil Moisture and Water Management
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Identifying Your Soil
• By County Soil Survey • Web Based Tools • Using Your Smart Phone
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By County Soil Survey - NRCS
• Paper copy • Large • Last update Jan 1984
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NRCS Web Soil Survey
• Launched in the early 200s • Coverage of the entire US • GIS driven • Free - no login
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Navigating Web Soil Survey
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Navigating Web Soil Survey
Zoom Tool
AOI Tool
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Navigating Web Soil Survey
Map Screen
Explore the Soil Data
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Navigating Web Soil Survey
Maps
Tables
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UC Davis Google Based Web Soil Data
http://casoilresource.lawr.ucdavis.edu/soilweb-apps
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UC Davis Google Based Web Soil Data
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UC Davis Google Based Web Soil Data
Ephrata
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UC Davis Google Based Web Soil Data
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SmartPhone App
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SmartPhone App
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SmartPhone App
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Soil Texture
• Sand (0.05 - 2.0 mm) • Silt (0.002 - 0.05 mm) • Clay (<0.002 mm)
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Soil Texture
• Sand (0.05 - 2.0 mm) • Silt (0.002 - 0.05 mm) • Clay (<0.002 mm)
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Soil Texture
• Soil water holding capacity
• Cation exchange • Nutrition
• Organic matter “modifies”
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Soil Texture - Let’s try it!
http://puyallup.wsu.edu/soils/soils/
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What is a Soil Test?
•Snapshot in time•Combination of actual and extrapolated measurements•Interpretation is EVERYTHING•Test labs, kits, calibration
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Collecting the Sample
• Troubleshooting vs planning management• Representative sample collection
– Random– Zone sampling– Area Sampling
• Z pattern• W pattern
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Tools
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Collecting the Sample
• Sample depth considerations• Composite the sample• Mix well• Sub sampling• Sample handling
– Plastic bag– Kept cool– Get to the lab quickly
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Choosing a Lab
• Local! • Proficiency Testing (NAPT or other) • Sample drop off location • Turn around time
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Reference material - WSU EB 1971E
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Soil Moisture and Water Management
• Soil water holding capacity• Water movement in soils• Depth of water • Water quality• Salts and salinity
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How Water Moves in Soils (Timelapse)
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How Water Moves in Soils (Timelapse)
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How Water Moves in Soils (Timelapse)
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How Water Moves in Soils (Timelapse)
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How Water Moves in Soils (Timelapse)
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How Water Moves in Soils (Timelapse)
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How Water Moves in Soils (Timelapse)
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How Water Moves in Soils (Timelapse)
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How Water Moves in Soils (Timelapse)
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Soil Moisture and Water Management
• More movement by gravity in sandier soils• More lateral movement in finer texture soils• Impacts of layers and texture changes
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Outline Revisited
• Identifying Your Soil
• Soil Texture
• Soil Sampling and Testing
• Soil Moisture and Water Management
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Questions?