Application of nitrogen generated by cattle at dairies and feedlots to farm land in the United States Pacific Northwest for 2002

This spatial data set was created by the U.S. Geological Survey (USGS) to represent the amount of nitrogen generated at confined cattle operations that was applied to...本空间数据集由美国地质调查局（U.S. Geological Survey, USGS）编制，用于表征集约化圈养牛场产生并施用于……的氮素总量。