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Rquefts  

Quantitative Evaluation of the Native Fertility of Tropical Soils
View on CRAN: Click here


Download and install Rquefts package within the R console
Install from CRAN:
install.packages("Rquefts")

Install from Github:
library("remotes")
install_github("cran/Rquefts")

Install by package version:
library("remotes")
install_version("Rquefts", "1.2-8")



Attach the package and use:
library("Rquefts")
Maintained by
Robert J. Hijmans
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2019-10-01
Latest Update: 2025-07-17
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) for the technical details and Sattari et al. (2014) for a recent evaluation and improvements.
How to cite:
Robert J. Hijmans (2019). Rquefts: Quantitative Evaluation of the Native Fertility of Tropical Soils. R package version 1.2-8, https://cran.r-project.org/web/packages/Rquefts. Accessed 08 Oct. 2026.
Previous versions and publish date:
(2026-07-09 08:23), 1.0-5 (2019-10-01 14:00), 1.0-7 (2020-03-13 06:10), 1.2-1 (2021-04-30 21:50), 1.2-3 (2023-10-24 14:30), 1.2-4 (2024-10-23 10:50), 1.2-5 (2025-07-18 01:00)
Other packages that cited Rquefts R package
View Rquefts citation profile
Other R packages that Rquefts depends, imports, suggests or enhances
Complete documentation for Rquefts
Functions, R codes and Examples using the Rquefts R package
Some associated functions: Rquefts-package . fertApp . fertilizer . nutSupply . predict . quefts . 
Some associated R codes: RcppExports.R . a_generic_functions.R . fcc.R . ferti_funs.R . nutSupply.R . rquefts.R . spatial.R . zzz.R .  Full Rquefts package functions and examples
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