Notes

Slide Show

Outline

1	"Greg Schwab Extension Soil Management..." Greg Schwab Extension Soil Management Specialist
2	Outline Correlations with soil properties How EC sensors work EC accuracy EC stability
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4	Soil Variability
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6	Sensors Continuous real-time measurement of soil properties Directed sampling techniques
7	The Premise Soil conducts electricity differentially depending on soil properties.
8	Soil Electrical Conductivity
9	EC vs. Clay
10	Soil and Yield Variability 8” of topsoil is critical level Each additional in. increased corn yields by 10.1 bu/ac up to 8” on average.
11	EC vs. Depth to Clay
12	EC vs. Depth to Fragipan
13	Factors that affect EC Texture Moisture Ions in solution Salinity, N, P, K, etc Soil structure Porosity
14	Map Stability
15	What We Know So Far Good correlations can be found for several soil properties The correlations are field specific, and often time dependent Soil texture is primary driving factor Soil moisture primarily effects EC magnitude Maps are relatively stable
16	EC and Yield
17	Summary EC calibrations vary by field and by time or region EC can help delineate management zones and explain yield variability EC maps in conjunction with yield maps could be used to identify management opportunities
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