Agronomy TrainingAgronomy TrainingNovember 9, 2005November 9, 2005

@@

WSUWSU

Ryan Maiden, Ag Tech RepRyan Maiden, Ag Tech Rep

EC Maps, what do they mean?EC Maps, what do they mean?

Veris Direct Soil ContactVeris Direct Soil Contact

The amount of clay in the soil plays a huge role in water and nutrient holding capacity. The cation-exchange capacity (CEC) of the soil is based largely on the clay content. If you can map this accurately, you have a good start on defining the differences in productive potential in the field.

Why is soil texture important?Why is soil texture important?

Improved soil sampling: “Directed Improved soil sampling: “Directed grids”grids”

x

x

x

x

x x

xx

x

x

x

x

x

x

x

x

Conventional grids

Directed grid sampling

Brian E.

Improved soil sampling: Improved soil sampling: “Management Zones”“Management Zones”

Sampling density and lab analysis costs can be reduced by dividing a field into management zones, based on soil EC and soil texture variability. In this example of zones, the number of samples was reduced by 50% versus 2.5 acre grids.

Zone 1

Zone 2

Zone 3

Zone 4

Finish!

Questions ?Questions ?