Package: Rquefts
Type: Package
Title: Quantitative Evaluation of the Native Fertility of Tropical
        Soils
Version: 1.2-8
Date: 2026-03-17
LinkingTo: Rcpp
Imports: meteor, methods, Rcpp (>= 0.12.4)
Suggests: terra, limSolve
Authors@R: c(
	person("Robert J.", "Hijmans", role = c("cre", "aut"),  email = "r.hijmans@gmail.com"),
	person("Pieter", "Pypers", role = c("ctb", "aut")),
	person("Joost", "Wolff", role = "ctb"))
Description: An implementation of the QUEFTS (Quantitative Evaluation of the Native Fertility of Tropical Soils) model. The model (1) estimates native nutrient (N, P, K) supply of soils from a few soil chemical properties; and (2) computes crop yield given that supply, crop parameters, fertilizer application, and crop attainable yield. See Janssen et al. (1990) <doi:10.1016/0016-7061(90)90021-Z> for the technical details and Sattari et al. (2014) <doi:10.1016/j.fcr.2013.12.005> for a recent evaluation and improvements. There are also functions to compute optimal fertilizer application rates.
License: GPL (>= 3)
BugReports: https://github.com/cropmodels/Rquefts/issues
URL: https://CRAN.R-project.org/package=Rquefts
NeedsCompilation: yes
Packaged: 2026-03-17 15:03:25 UTC; rhijm
Author: Robert J. Hijmans [cre, aut],
  Pieter Pypers [ctb, aut],
  Joost Wolff [ctb]
Maintainer: Robert J. Hijmans <r.hijmans@gmail.com>
Repository: CRAN
Date/Publication: 2026-03-17 16:00:02 UTC
Built: R 4.6.0; x86_64-apple-darwin20; 2026-04-27 02:21:23 UTC; unix
Archs: Rquefts.so.dSYM
