County-level estimates of nitrogen and phosphorus from animal manure (2007 and 2012) and 30-meter-resolution grid of counties (2010) for the conterminous United States

There are two datasets in the compressed file along with individual metadata files which completely describe the datasets. The first data set consists of county estimates of nitrogen and phosphorus in kilograms from animal manure for the conterminous United States for 2007 and 2012. These data are available as both text files and spreadsheets. These estimates were based on county-level population data of livestock, poultry, and other animals (cattle, poultry, hogs and pigs, horses and ponies, sheep and lambs) from the 2007 and 2012 Census of Agriculture, using methods described in U.S. Geological Survey Scientific Investigations Report 2006-5012. The second dataset is a 30 by 30 meter (m) resolution grid of counties in the conterminous United States as defined in the year 2010 that was used to assign the animal population per county. This county grid allows the first dataset described to be compared to prior publications of nitrogen and phosphorus content of manure.