A watershed based model, the Soil and Water Assessment Tool (SWAT), along with transfer coefficients is used to assess alternative principles of allocating nutrient load reduction in the Raccoon River watershed in central Iowa. Four principles are examined for their cost-effectiveness and...

While biofuels may yield renewable fuel benefits, there could be downsides in terms of water quality and other environmental stressors, particularly if corn is relied upon exclusively as the feedstock. In this article, we describe a modeling system that links agricultural land use decisions in...

Land retirement and other agricultural conservation actions contribute greenhouse gas offsets and water quality improvements and reduce erosion and nitrogen runoff. Shifting the programmatic focus to carbon would enhance C sequestration and reduce nitrogen runoff, but would likely increase erosion.