Application of fertilizer nitrogen to nonfarm 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 fertilizer nitrogen that was applied to nonfarm land in the Pacific...该空间数据集由美国地质调查局（U.S. Geological Survey, USGS）构建，旨在表征太平洋地区非农业用地所施用的肥料氮施用量……