| Type: | Package |
| Title: | County-Level Estimates of Fertilizer Application in USA |
| Version: | 0.1.5 |
| Maintainer: | Wenlong Liu <wliu14@ncsu.edu> |
| Description: | 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. |
| License: | GPL-2 | GPL-3 [expanded from: GPL] |
| URL: | https://github.com/wenlong-liu/usfertilizer |
| BugReports: | https://github.com/wenlong-liu/usfertilizer/issues |
| Depends: | R (≥ 2.10) |
| Imports: | tidyverse |
| Suggests: | knitr, rmarkdown |
| Encoding: | UTF-8 |
| LazyData: | false |
| RoxygenNote: | 6.0.1 |
| VignetteBuilder: | knitr |
| NeedsCompilation: | no |
| Packaged: | 2018-04-02 15:26:26 UTC; yingxigeng |
| Author: | Wenlong Liu [aut, cre] |
| Repository: | CRAN |
| Date/Publication: | 2018-04-02 17:49:16 UTC |
usfertilizer.
Description
usfertilizer.
us_fertilizer_county
Description
This is data adapted from the county-level estimates of fertilizer nitrogen and phosphorus based on commercial sales from 1945 to 2012. Please visit [here](https://www.sciencebase.gov/catalog/item/5851b2d1e4b0f99207c4f238) for more details.
Usage
us_fertilizer_county
Format
A data frame with 582012rows and 11 variables:
- FIPS
FIPS is a combination of state and county codes, in character format.
- State
The state abbr. of U.S.
- County
County name in U.S.
- ALAND
The land area in each county, unit: km squared
- AWATER
The water area in each county, unit: km squared
- INTPTLAT
The latitude of centriod in each county, e.g. 32.53638
- INTPTLONG
The longitude of centriod in each county, e.g. -86.64449
- Quantity
The quantity of fertilizeation as N or P, e.g. kg N or kg P
- Year
The year of estimated data, e.g. 1994
- Nutrient
The fertilizer type, e.g. N or P
- Farm.Type
The land use type of fertilizer, e.g. farm and nonfarm
- Input.Type
The input type of nutrient, e.g. Fertilizer or Manure
...
Examples
require(usfertilizer)
data(us_fertilizer_county)