soilNutrientSupply: Soil nutrients supply for QUEFTS model

In Rquefts: Quantitative Evaluation of the Native Fertility of Tropical Soils

Description

Computes the base (unfertilzied) soil supply of N, P and K according to Janssen et al., 1990, Table 2. For use with the QUEFTS model.

Usage

soilNutrientSupply(pH, SOC, Kex, Polsen, Ptotal=NA)

Arguments

pH	soi pH
SOC	Soil organic carbon (g/kg)
Kex	Exchangeble K (mmol/kg)
Polsen	P-Olsen (mg/kg)
Ptotal	Total P (mg/kg)

Value

Three column matrix with Nsup, Psup and Ksup (kg/ha): the potential supply of N, P and K of the (unfertilzed) soil.

References

Janssen et al., 1990. A system for the quantitative evaluation of tropical soils. Geoderma 46: 299-318

Examples

s <- soilNutrientSupply(6, c(23, 11, 35), 15, c(1.6, 2.6, 2.4))
s

Rquefts documentation built on May 2, 2019, 4:53 p.m.