| Rquefts-package {Rquefts} | R Documentation |
Quantitative Evaluation of the Native Fertility of Tropical Soils
Description
This package provides implments the QUEFTS model.
QUEFTS (Quantitative Evaluation of the Native Fertility of Tropical Soils) 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, fertilizer application and crop parameters. 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.
The package is particularly useful if you want to make spatial predictions with QUEFTS.
There are also a few functions that can help with computing the amount of nutriets supplied with fertilizer (blends) and compute the optimal use of fertilizer given a goal in nutrients, available products, and their prices.