soiltestcorr: Soil Test Correlation and Calibration

A compilation of functions designed to assist users on the correlation analysis of crop yield and soil test values. Functions to estimate crop response patterns to soil nutrient availability and critical soil test values using various approaches such as: 1) the modified arcsine-log calibration curve (Correndo et al. (2017) <doi:10.1071/CP16444>); 2) the graphical Cate-Nelson quadrants analysis (Cate & Nelson (1965)), 3) the statistical Cate-Nelson quadrants analysis (Cate & Nelson (1971) <doi:10.2136/sssaj1971.03615995003500040048x>), 4) the linear-plateau regression (Anderson & Nelson (1975) <doi:10.2307/2529422>), 5) the quadratic-plateau regression (Bullock & Bullock (1994) <doi:10.2134/agronj1994.00021962008600010033x>), and 6) the Mitscherlich-type exponential regression (Melsted & Peck (1977) <doi:10.2134/asaspecpub29.c1>). The package development stemmed from ongoing work with the Fertilizer Recommendation Support Tool (FRST) and Feed the Future Innovation Lab for Collaborative Research on Sustainable Intensification (SIIL) projects.

Version: 2.1.2
Depends: R (≥ 2.10)
Imports: stats, dplyr, rlang, tidyr, utils, purrr, data.table, ggplot2, ggpp, nlstools, minpack.lm, modelr, AICcmodavg
Suggests: knitr, rmarkdown, testthat
Published: 2022-06-12
Author: Adrian A. Correndo ORCID iD [cre, cph], Adrian A. Correndo ORCID iD [aut], Austin Pearce ORCID iD [aut], Deanna Osmond ORCID iD [aut], Ignacio A. Ciampitti ORCID iD [aut]
Maintainer: Adrian A. Correndo <correndo at>
License: MIT + file LICENSE
NeedsCompilation: no
Materials: README NEWS
CRAN checks: soiltestcorr results


Reference manual: soiltestcorr.pdf
Vignettes: Introduction
Cate and Nelson (1965)
Cate and Nelson (1971)
Linear-plateau response
Mitscherlich-type response
Modified ALCC
Quadratic-plateau response


Package source: soiltestcorr_2.1.2.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): soiltestcorr_2.1.2.tgz, r-oldrel (arm64): soiltestcorr_2.1.2.tgz, r-release (x86_64): soiltestcorr_2.1.2.tgz, r-oldrel (x86_64): soiltestcorr_2.1.2.tgz
Old sources: soiltestcorr archive


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