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Abstract
The CREAMS (Chemicals, Runoff, and Erosion from Agricultural Management Systems) model was used to evaluate soil and nutrient losses for typical field situations in Lancaster County, Pennsylvania. A wide range of field scenarios was modeled as part of the economic evaluation of the RCWP (Rural Clean Water Program) project. Best management practices (BMPs) reduced surface losses of nutrients. Reducing the amount of nitrogen applied to the field was the only effective method for reducing percolate losses of nitrates. Stored manure provides more plant-available nitrogen than does daily-spread manure.