This is a R package that implements the QUEFTS (Quantitative Evaluation of the Native Fertility of Tropical Soils) model
You can install the current release of the package from CRAN with:
install.packages("Rquefts")
To install the development version you can do:
install.packages("meteor")
remotes::install_github("cropmodels/Rquefts")
Note that you need to have the remotes package installed, and if you are on windows, you must also have Rtools installed to be able to compile and install this package.