Estimates of county-level nitrogen and phosphorus from fertilizer and manure from 1950 through 2017 in the conterminous United States

First posted January 29, 2021 For additional information, contact: Earth System Processes DivisionWater Mission AreaU.S. Geological Survey12201 Sunrise Valley DriveReston, VA 20192Contact Pubs Warehouse This report and associated dataset provide tabular county-level estimates of kilograms nitrogen phosphorus generated from two sources: (a) fertilizer commercial sources (b) livestock-based manure, for the period 1950 through 2017 conterminous United States. Datasets collected during this time span are intervals approximately 5 years that coincide with U.S. Department Agriculture’s census years. Nutrients 1950–2012 exactly those previously described in Survey (USGS) reports datasets; however, nutrient masses applied here as a new product modeled 11 predictor variables including expenditures, land use, acres fertilized land. Fertilizer-based provided both farm nonfarm (urban) usage. The nutrients manure all were anew by using methods formulas previous USGS but adjusted to account historical changes annual averages animal weights. data available an accompanying release.