There is limited information available explaining the agronomic and economic relationships between yield and nitrogen … to determine the effects of nitrogen and phosphorus fertilizers on feedstock yield and measures of expected total cost … discrete nitrogen treatments (0 and 134 kg ha-1) and four discrete phosphorus treatments (0, 30, 60 and 90 kg ha-1) were …

. Optimal nitrogen rates are calculated for two yield response functions: linear response plateau and quadratic. Nonstochastic … are small since optimal nitrogen rates do not differ greatly between stochastic and nonstochastic models. …

in a lower average harvestable yield per acre and would require more nitrogen fertilizer, less land for storage, and more …

We estimate the cost of offsets tied to reductions in the use of nitrogen on U.S. cornfields under the proposed …

Using ammonium based nitrogen fertilizers in crop production has been shown to acidify soils. Lime used to correct soil … pH is an important cost to producers. Recommendations of the optimal level of nitrogen to apply typically ignore the cost … of lime created by nitrogen fertilization. This study was aimed to estimate soil pH change in response to nitrogen and …

is to compare potential atrazine, nitrogen, and sediment loadings from regional conventional and alternative cropping … conventional system, but higher loading levels for nitrogen …

nitrogen, phosphorus, and sediment necessary to reverse declines in the Bay’s quality and associated biological resources …