Simulating effects of variable nitrogen application rates on corn yields and NO[3]-N losses in subsurface drain water

Using a model as a management tool requires testing of the model against field-measured data prior to its application for solving natural resource problems. This study was conducted to test the Root Zone Water Quality Model (RZWQM98) using four years (1996 to 1999) of field-measured data to simulate the effects of different N-application rates on corn yields and nitrate-nitrogen (NO[3]-N) losses via subsurface drain water. Three N-application rates (low, medium, and high), each replicated three times, were applied to corn in 1996 and 1998 under a randomized complete block design at a tile-drained corn-soybean rotation field near Story City, Iowa. No N-fertilizer was applied to soybean in 1997 and 1999. Model calibration...

Categories: Publication; Types: Citation; Tags: Data Visualization & Tools, Dose activity relation, Drainage water, Eau drainage, Fertilisation Soil pollution, All tags... Iowa, Landscapes, Nitrate, Nitrates, Nitrogen fertilization, Northeast CASC, Other Landscapes, Pollution sol, Relation dose response, Rendement, Science Tools For Managers, Yield, Zea mays, Fewer tags