Application of nitrogen generated by grazing cattle to range land in the United States Pacific Northwest for 2002
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资源简介：
This spatial data set was created by the U.S. Geological Survey (USGS) to represent the amount of nitrogen generated by grazing cattle that was applied to range land in the Pacific Northwest region of the United States (Hydro Region 17; Major River Basin 7 (MRB7)) during 2002.
创建时间：
2016-10-29
