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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.
Package details |
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Author | Robert J. Hijmans [cre, aut], Pieter Pypers [ctb, aut], Joost Wolff [ctb] |
Maintainer | Robert J. Hijmans <r.hijmans@gmail.com> |
License | GPL (>= 3) |
Version | 1.2-3 |
URL | https://CRAN.R-project.org/package=Rquefts |
Package repository | View on CRAN |
Installation |
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