usfertilizer: County-Level Estimates of Fertilizer Application in USA

Compiled and cleaned the county-level estimates of fertilizer, nitrogen and phosphorus, from 1945 to 2012 in United States of America (USA). The commercial fertilizer data were originally generated by USGS based on the sales data of commercial fertilizer. The manure data were estimated based on county-level population data of livestock, poultry, and other animals. See the user manual for detailed data sources and cleaning methods. 'usfertilizer' utilized the tidyverse to clean the original data and provide user-friendly dataframe. Please note that USGS does not endorse this package. Also data from 1986 is not available for now.

Version: 0.1.5
Depends: R (≥ 2.10)
Imports: tidyverse
Suggests: knitr, rmarkdown
Published: 2018-04-02
DOI: 10.32614/CRAN.package.usfertilizer
Author: Wenlong Liu [aut, cre]
Maintainer: Wenlong Liu <wliu14 at>
License: GPL-2 | GPL-3 [expanded from: GPL]
NeedsCompilation: no
Materials: NEWS
CRAN checks: usfertilizer results


Reference manual: usfertilizer.pdf
Vignettes: Data sources and processing procedures
Introduction of usfertilizer, an R package


Package source: usfertilizer_0.1.5.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): usfertilizer_0.1.5.tgz, r-oldrel (arm64): usfertilizer_0.1.5.tgz, r-release (x86_64): usfertilizer_0.1.5.tgz, r-oldrel (x86_64): usfertilizer_0.1.5.tgz
Old sources: usfertilizer archive


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