-maximizing nitrogen rates, yields, and net returns for corn grown after corn, cotton, and soybeans. The stochastic response functions were … best. The profit-maximizing nitrogen rates were similar for corn after corn, cotton, and soybeans, but relative to corn …

. Optimal nitrogen application recommendations are calculated for the linear response plateau and Spillman-Mitscherlich. The … stochastic models lead to smaller recommended levels of nitrogen, but the economic benefits of using fully stochastic crop yield …

The effects of considering variable within-farm soil runoff and leaching potential on costs of reducing nitrogen losses … are analyzed for a Virginia dairy. Manure applications may cause nitrogen losses through runoff and leaching because of … factors such as uncertain nitrogen mineralization. Farmers can reduce nitrogen control costs by applying manure on soils with …

Winter legumes can substitute for applied nitrogen fertilization of corn. Stochastic dominance was used to order net … revenues from legume and applied nitrogen alternatives. Stochastic dominance orderings indicate that systems combining vetch … with low applied nitrogen fertilization (50 and 100 pounds/acre, respectively) were risk inefficient. By contrast, vetch …

Potential benefits of variable rate nitrogen application are illustrated and information needs identified. Lower costs …

This paper identifies optimal combinations of nitrogen in the form of urea, fresh litter and composted litter for rice … poultry litter and urea nitrogen depends on such factors as soil fertility, the yield response to litter application and the … relative prices of nitrogen and litter. The use of litter is more economical at high target yields than at low target yields. …

Anaerobic digesters that capture and burn manure methane can provide a renewable source of energy and reduce greenhouse …