Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: July 20, 1999
Publication Date: N/A
Technical Abstract: Research suggests that perennial plant species use water and nitrogen over a longer period and in greater amounts than annual crops. This study compares various combinations of perennial forages, annual crops, soil types, climates, aquifer characteristics, management practices, and economic scenarios using the computer model GLEAMS (Groundwater Loading Effects from Agricultural Management Systems) for the purpose of improving nitrogen management on agricultural lands overlying sensitive aquifers (thin, permeable soils and shallow water tables). Modeling analyses using this approach can be completed in a matter of weeks, whereas field-plot experiments would require several years and considerable resources. By using computer simulation models and GIS to first identify areas of concern and then develop appropriate management systems for these areas, sensitive aquifers can be protected from further or future nitrate contamination.