maximum likelihood. Optimal levels of nitrogen were lower than recommended levels. …

. 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 …

Ramped calibration strips have been suggested as a way for grain producers to determine nitrogen needs more accurately …. The strips use incrementally increasing levels of nitrogen and enable producers to conduct an experiment in each field to … determine nitrogen needs. This study determines whether predictions from the program Ramp Analyzer 1.2 are replicable in …

. 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. …

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 …