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 response patterns to nutrient availability and critical soil test values using alternative 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 regression (Melsted & Peck (1977) <doi:10.2134/asaspecpub29.c1>).

Version: 2.1.1
Depends: R (≥ 2.10)
Imports: stats, dplyr, rlang, tidyr, utils, purrr, data.table, ggplot2, ggpp, nlstools, minpack.lm, modelr, AICcmodavg
Suggests: smatr, covr, knitr, rmarkdown, testthat
Published: 2022-05-11
Author: Adrian A. Correndo ORCID iD [cre, cph], Adrian A. Correndo ORCID iD [aut], Austin Pearce 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 response
Modified ALCC
Quadratic-plateau response


Package source: soiltestcorr_2.1.1.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): soiltestcorr_2.1.1.tgz, r-oldrel (arm64): soiltestcorr_2.1.1.tgz, r-release (x86_64): soiltestcorr_2.1.1.tgz, r-oldrel (x86_64): soiltestcorr_2.1.1.tgz


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