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Unformatted text preview: ust, straw, etc.), will increase biological activity and cause a greater demand for N, and thus result in N immobilization Immobilization only temporarily locks up N. When the microorganisms die, the organic N contained in their cells is converted by mineralization and nitrification to plant available nitrate. For more information Leaching is a pathway of N loss of a high concern to water quality. Soil particles do not retain nitrate very well because both are negatively charged. As a result, nitrate easily moves with water in the soil. The rate of leaching depends on soil drainage, rainfall, amount of nitrate present in the soil, and crop uptake. The EPA has set the maximum contaminant level for drinking water at 10 ppm N as nitrate. Well-drained soils, unexpected low crop yield, Department of Crop and Soil Sciences Nutrient Management Spear Program http://nmsp.css.cornell.edu Authors Courtney Johnson, Greg Albrecht, Quirine Ketterings, Jen Beckman, and Kristen Stockin 2005 2 College of Agriculture and Life Sciences...
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This note was uploaded on 10/12/2012 for the course BIOTECH BT101 taught by Professor Gardy during the Spring '12 term at Indian Institute of Technology, Chennai.

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