Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for confined manure (gwava-s_conf)
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This data set represents the average annual nitrogen input from confined animal manure, 1992 and 1997, in kilograms per hectare, in the conterminous United States....
本数据集记录了1992年与1997年美国本土（conterminous United States）范围内，圈养动物粪便带来的年均氮输入量，单位为千克每公顷……
