pects the EPA to opt for standards on total phosphorus, Hoeft said. If so, farmers will be urged to convert more of their cropland into a no-till soil-conservation strategy to reduce erosion and runoff. The UI also would suggest the injection of liquid manure and fertilizer into the soil just below the surface. Scientists are achieving good results using a lift-and-drop method that helps maintain the protective residue of groundcover on no-till fields.

If the EPA instead targets soluble phosphorus, farmers would be advised to maintain soil phosphorus for optimum crop production, inject all phosphorus materials and reduce erosion.

We should not be getting high phosphorus field tests, Hoeft said. Continually applying manure is going to continue to build phosphorus levels up. We need to be putting the manure below the surface and, in many cases, moving excess manure further on down the road to get it to fields in need. Based on the data that weve collected, weve got some really good management practices ready to go.

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Contact: Jim Barlow
b-james3@uiuc.edu
217-333-5802
University of Illinois at Urbana-Champaign
3-Dec-2001

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