Publication | Closed Access
EVALUATION OF EPIC FOR A SHALLOW NEW ENGLAND SOIL: II. SOIL NITRATE
12
Citations
0
References
1997
Year
Soil ErosionBiogeochemistryPrecision AgricultureEngineeringErosion PredictionLand UseSoil ScienceAgricultural EconomicsSoil FunctionSoil NitrateSoil DegradationEpic-default ValuesSoil FertilityErosion-productivity Impact CalculatorCompact Glacial TillSedimentologyEarth ScienceSediment Transport
The Erosion-Productivity Impact Calculator (EPIC) model was evaluated for the prediction of nitrate (NO3-N) concentrations in a fine sandy loam underlain by a compact glacial till in Connecticut. Predicted soil NO3-N levelsfrom EPIC simulations were compared with measured levels from maize (Zea mays L.) and fallow plots with five nitrogen(N) application rates for three years. Soil NO3-N concentrations were measured at 15-cm increments to a total depth of60 cm. Initial simulations showed that use of measured soil parameter values versus EPIC-default values produced muchbetter results. The accuracy of EPIC predicted versus observed NO3-N using measured soil parameters values varied,with better predictions for fallow than maize and for deeper than shallow soil depths.