Article Abstract:
A sample selection model was used to estimate nitrate percolation response functions for the Seymour aquifer area of Texas. There is a positive relationship between concentration of nitrate and irrigation because irrigation water contains some nitrate. In Abilene soil, the nitrate concentration is found to be higher, and under minimum tillage, the concentration decreases. Also, the concentration of nitrate percolation is higher in dryland cotton than in irrigated cotton. Thus, design standards are an effective method to control nitrate percolation in the Seymour aquifer region.
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Article Abstract:
Factors that influence farmers' motivations for participation in the Cambrian Mountains environmentally sensitive areas scheme were investigated. A behavioral approach considered several factors such as, scheme factors, farmer factors, information environment, and dynamics within the farm district in assessing farmer participation in agricultural-environmental schemes. It was found that a behavioral approach provides valuable insights about farmers' decision-making behavior.
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Article Abstract:
A simple deterministic model of nitrogen management was proposed for dairy production enterprise. The sensitivity analysis was recommended to determine the relative importance of manipulating herd nutrition, manure management, and crop selection in minimizing nitrogen losses in the farm. Modifying diet formulation or herd management was potentially evident for reducing nutrient losses in dairy production.
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