Category Archives: Fertility & Soil

Applying Gypsum to Wisconsin Soils

Applying Gypsum to Wisconsin Soils Dick Wolkowski, Extension Soil Scientist The interest in the use of gypsum in crop production has increased in Wisconsin for a variety of reasons. The installation of “scrubbers” at coal-fired power plants has reduced S emissions … Continue reading

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Nutrients to Watch in 2011: Sulfur and Potassium

Nutrients to Watch in 2011: Sulfur and Potassium Carrie Laboski, Extension Soil Fertility Specialist, University of Wisconsin-Madison, Jerry Clark, Crop & Soils Agent, University of Wisconsin-Extension, Chippewa and Eau Claire Counties Sulfur (S) and potassium (K) are two nutrients that … Continue reading

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Phosphorus Content of Dairy Rations and Manure Wisconsin Trends 2002-2010

Phosphorus Content of Dairy Rations and Manure Wisconsin Trends 2002-2010  John Peters, Department of Soil Science Comparison of dairy TMR total P levels with manure P content For the past nine years the UW Soil and Forage Analysis Laboratory has … Continue reading

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New Instructional Video on Calibrating a Manure Spreader

New Instructional Video on Calibrating a Manure Spreader Kevin B. Shelley, UWEX Nutrient and Pest Management Program The UW Extension Nutrient and Pest Management Program has produced an instructional video on determining manure application rates as part of the process … Continue reading

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Soil Sampling and Testing Issues For Nutrient Management: Certified Labs and Grid Sampling

Soil Sampling and Testing Issues For Nutrient Management: Certified Labs and Grid Sampling Kevan Klingberg, UW Discovery Farms Program Twice this winter I have run into snags helping individual producers walk their way into loading farm information into SNAP-Plus (nutrient … Continue reading

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Nutrient Content for Dairy and Swine Manure in Wisconsin, 1998-2010

Nutrient Content for Dairy and Swine Manure in Wisconsin, 1998-2010  John Peters, Department of Soil Science, UW-Madison The nutrient value of manure can be assigned by using estimated “book” or average available N, P2O5 and K2O content. However, testing manure may … Continue reading

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Average Soil Test Phosphorus and Potassium Levels Decline in Wisconsin

Average Soil Test Phosphorus and Potassium Levels Decline in Wisconsin John Peters, Department of Soil Science Soil test data from over five million samples collected from Wisconsin farmland and analyzed by both public and private Wisconsin Department of Agriculture, Trade … Continue reading

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Nitrogen Rate of Return Calculator UPDATED

Nitrogen Rate of Return Calculator UPDATED Mike Rankin, Crops and Soils Agent,UW Extension-Fond du Lac Co. A simple spreadsheet can be used to evaluate different net return per acre scenarios involving nitrogen (N) source, N cost, and expected corn price. The spreadsheet lets … Continue reading

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