conditions for undesirable phytoplankton blooms. Microalgae are efficient in removing nitrogen, phosphorus, and toxic metals from …

proposed policy options in the Upper Waikato catchment. In the first phase nitrogen emissions are determined for representative …

productivity and profitability is to be maintained and increased. Legacy stores of nitrogen (N) and phosphorus (P) in catchments …

Policymakers are concerned about nitrogen and phosphorus export to water bodies. Exports may be reduced by paying … evaluate the cost-effectiveness of practice and performance incentives for reducing nitrogen exports. Performance incentives …

The United States is the world's largest phosphate exporter and the world's largest potash importer. The U.s. nitrogen … trade balance, relatively stable before 1983, has shifted as the United States became a net importer of nitrogen beginning …, world and U.S. imports and exports of nitrogen, phosphate, and potash, and U.S. import origins and export destinations for …

benefits through a reduction in losses due to cold and an increase in yield from the better use of nitrogen by the cold …

. Specifically, it investigates the economic impact of SSNM, focusing on SSNM-induced changes in the yield, profit, nitrogen use and … profit by $150 per hectare. It has no statistically significant effect on the amount of pesticide and nitrogen use of farmers …

-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 …

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