Strategies to Reduce Nitrogen and Phosphorus Losses from Land Applied Animal Manure
Continued land application of animal manure to agriculture fields often results in elevated soil N and P concentrations that may exceed crop requirements and may be lost to surface water bodies. Several strategies can be used by landowners and animal producers to minimize losses of N and P from agricultural fields, including: dietary modification; manure amendments; manure application method and soil preparation; buffer strips; and using the P index to determine the manure application rates and risks. Researchers have demonstrated that both diet modifications and aluminum amendments can reduce soluble P in manure and runoff by 60 to 95%, while manure injection reduced runoff total P by 92 %. The employment of these and other strategies by responsible landowners is critical in reducing the vulnerability of N and P to losses via runoff following animal manure application.
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Document Type: Research Article
Publication date: 2007-09-01
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