Modeling field scale nitrogen non-point source pollution (NPS) fate and transport: Influences from land management practices and climate

The use of nitrogen (N) fertilizer marked the start modern agriculture that boosted food production to help alleviate shortages across globe but at cost severe environmental issues and critical stress agroecosystem. This paper was aimed determining fate transport nitrite ammonia under future climate projections by adapting recommended land management practices are supposed reduce nitrate N in surface water state government target. To accomplish these objectives, a fully-distributed physical-based hydrologic model, MIKE SHE, hydrodynamic river 11, were coupled with ECO-Lab simulate different forms agro-ecosystem Upper Sangamon River Basin (USRB). Twelve (12) combinations simulated evaluate USRB from 2020 2050. Under current management, concentration expected exceed EPA limit 10 ppm up 2.5% days simulation period. Regulating application rates approximately 50% rate will ensure this not be exceeded future. Implementing cover cropping alone can potentially decrease concentrations 33% dry saturated zone projections. By combining regulated 67% compared historic baseline. modeling framework developed used study effectiveness schemes reducing nutrient load our groundwater.