Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Nutrient Application (Phosphorus and Nitrogen ) for Fertilizer and Manure Applied to Crops (Cropsplit), 2002

This data set represents the estimated amount of phosphorus and nitrogen fertilizers applied to selected crops for the year 2002, compiled for every catchment of...本数据集涵盖2002年施用于选定作物的磷肥与氮肥估算施用量，该数据集系针对每一个汇水区（catchment）编制完成，