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60 Ways Farmers Can Protect  Surface Water
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52. Determine Your Soil's Potential For Runoff

Soil runoff rating

The amount of runoff water moving across the field has a lot to do with soil characteristics such as texture, organic matter content, and water-holding capacity. To get a handle on how these and other factors work together to affect pesticide losses in runoff water, check with your Cooperative Extension Service or Natural Resources Conservation Service offices.

The NRCS has analyzed the characteristics of each soil type to determine its potential for surface runoff losses. It places all soil types into one of three categories: high potential, intermediate potential, or low potential.

flooded field Once you find out your soil's runoff potential from the NRCS, you need to find out your pesticide's potential for surface runoff. Then put all of the pieces of information together with the soil-pesticide interaction screening procedure.
flooded field If one soil clearly dominates a field, select it as the representative soil type. If several soil types dominate a field, determine the runoff potential for each one. Then gear your pesticide selection to the one that is most susceptible to surface runoff. If the field has both fine-textured and coarse-textured soils, select two representative soils. Determine soil-pesticide interaction ratings for both.
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