Nitrogen and Phosphorous on Agricultural Land from Fertilizer and Manure 2007, 2012, and 2017

These files represent the estimated application of Nitrogen and Phosphorous from fertilizer aplication and manure on agricultural and non-agricultural land for each NHDPlus version2 reach catchment in kilograms for the years, 2007, 2012, and 2017. All files are in csv format and for NHDPlus Production Unit 07 only. The source data is from James Falcone's Estimates of County-Level Nitrogen and Phosphorus from Fertilizer and Manure from 1950 through 2017 in the Conterminous United States, Open-File Report 2020-1153, https://doi.org/10.3133/ofr20201153. The files are as follow: PXX, amount of estimated Phosphorous in kilograms applied on agricultural land where XX is the 2 digit year. NXX, amount of estimated Nitrogen in kilograms applied [...]