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Contents: The Use of Fertilizer and Its Environmental Consequences; The Impact of Farming Practices on Reducing Excess Nitrogen Fertilizer Use; The Application Timing of Nitrogen Fertilizer; The Effects of the Timing Nitrogen Fertilizer Application and Irrigation on Yield and Nitrogen Loss in Cotton Production; Costs of Reducing Residual Nitrogen on Cropland Vulnerable to Nitrate Leaching; Market-Based Incentives for Addressing nonpoint Water Quality Problems: A Residual nitrogen Tax Approach; An Evaluation of Soil Nitrogen Testing Considering the Carry-Over Effect; Using Insurance to Enhance Nitrogen Fertilizer Application Timing to Reduce Nitrogen Losses to the Environment.