Agricultural nitrogen losses are the major contributor to nitrogen loads in the Mississippi River, and consequently, to … reducing nitrogen losses. Of particular importance was the study's explicit focus on agricultural subsurface (tile) drainage …, which has been identified as the major pathway for agricultural nitrogen losses in the upper Midwest, and the use of …

Agricultural nitrogen is a major contributor to Gulf of Mexico hypoxia, and research has shown that agricultural … subsurface tile drainage is a major carrier of nitrogen from croplands to streams and rivers. This study compares the results of … abating nitrogen under a retired-land minimization policy with those of a new revenue-maximizing policy, paying particular …

. 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 …

This study presents changes in the concentrations of nitrogen and phosphorus in two streams in Western Antarctica … concentrations of the determined forms of N and P between 2001 and 2005. The decrease ranged from 9.3% for reactive phosphorus to 73 ….2% for ammonium-nitrogen. Such inferred declines in N and P concentrations are considered to reflect reduced deposition on …

In this review, we present the recent developments and future prospects of improving nitrogen use efficiency (NUE) in … alternative farming techniques based on no-till continuous cover cropping cultures and/or organic nitrogen (N) nutrition. Whatever …

Globally, we are applying excessive nitrogen (N) fertilizers to our agricultural crops, which ultimately causes … nitrogen pollution to our ecosphere. The atmosphere is polluted by N2O and NOx gases that directly and indirectly increase … atmospheric warming and climate change. Nitrogen is also leached from agricultural lands as the water-soluble form NO3 2, which …

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 …

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 … models were used to estimate the effects of nitrogen, phosphorus and nitrogen by phosphorus interactions on feedstock yield …

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