Application of fertilizer phosphorus 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 fertilizer phosphorus that was applied to farm land in the Pacific...本空间数据集由美国地质调查局（U.S. Geological Survey, USGS）编制，旨在表征太平洋地区农田施用的化肥磷素施用量。