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英文文献：Reducing Crop Nutrient Applications: The Yield Reserve Program-减少作物养分的应用:产量储备计划
英文文献作者：Metcalfe, Todd,Bosch, Darrell J.,Pease, James W.
英文文献摘要：
A proposed Yield Reserve Program designed to compensate farmers for any reduced yields resulting from reduced nitrogen (N) application rates below recommended rates is evaluated. Assuming that farmers currently follow extension recommendations for applying N, Yield Reserve Program participation reduces expected net revenue by $10 to $13/ha. The Yield Reserve Program reduces expected net revenue by $17 to $20/ha for farmers who apply N to maximize expected net revenue. Farmers' costs of participation increase with lower probabilities of inadequate rainfall and higher corn prices and decline with higher N prices. The Yield Reserve Program can significantly reduce N applications to cropland, which may reduce N content of surface waters, but the costs to taxpayers and farmers will depend on how the program is implemented.
一项旨在补偿农民因氮肥施用量低于推荐量而造成的产量下降的产量储备计划已得到评估。假设农民目前按照推广建议施用氮肥，参与产量储备计划将使预期净收入减少10 - 13美元/公顷。对于施用氮肥以实现预期净收入最大化的农民来说，产量储备计划使他们的预期净收入减少了17 - 20美元/公顷。农民的参与成本随着降雨量不足和玉米价格上涨概率的降低而增加，随着N价格的升高而下降。产量储备计划可以显著减少农田施氮量，这可能会降低地表水的氮含量，但纳税人和农民的成本将取决于该计划如何实施。
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