Skip to main content

County-Level Estimates of Nitrogen and Phosphorus from Commercial Fertilizer for the Conterminous United States, 1987-2012


Publication Date
Start Date
End Date


Brakebill, J.W. and Gronberg, J.M., 2017, County-Level Estimates of Nitrogen and Phosphorus from Commercial Fertilizer for the Conterminous United States, 1987-2012: U.S. Geological Survey data release,


This data set contains county-level estimates of nitrogen and phosphorus from fertilizer, for both farm and nonfarm uses, for the conterminous United States, for 1987 through 2012. State-level farm and nonfarm nitrogen and phosphorus were derived from the Association of American Plant Food Control Officials (AAPFCO) commercial fertilizer sales data. State estimates were then allocated to the county-level using fertilizer expenditure from the Census of Agriculture as county weights for farm fertilizer, and effective population density as county weights for nonfarm fertilizer. Data computations for 2007 - 2012 estimates are results of methods applied directly from Gronberg and Spahr, 2012. Data for 1987 - 2006 are exactly those published [...]


Point of Contact :
John Brakebill
Originator :
John W Brakebill, Jo Ann M. Gronberg
Metadata Contact :
John Brakebill
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Water Resources
SDC Data Owner :
Office of Planning and Programming

Attached Files

Click on title to download individual files attached to this item.

CNTY_FERT_1987-2012.csv 2.02 MB text/csv


The U.S. Geological Survey, National Water-Quality Assessment project requires nutrient input for analysis of the national and regional assessment of water quality. Detailed information on nutrient inputs to the environment is needed to understand and address the many serious problems that arise from excess nutrients in the streams and groundwater of the Nation. This data set provides estimates of nonpoint nitrogen and phosphorus associated with commercial fertilizer for the conterminous United States for 1987 through 2012. It is intended for regional and national scale applications.



  • USGS Data Release Products



Data source
Input directly

Additional Information


Type Scheme Key
DOI doi:10.5066/F7H41PKX

Item Actions

View Item as ...

Save Item as ...

View Item...