Estimation of precompression stress by Saffih-Hdadi et al. (2009)
It calculates the precompression stress using the pedo-transfer function from Saffih-Hdadi et al. (2009)
soilStrength3(bulk.density, water.content,
texture=c("VeryFine","Fine","MediumFine","Medium","Coarse"))bulk.density |
a numeric vector containing the values of soil bulk density, Mg m^{-3} |
water.content |
a numeric vector containing the values of gravimetric water content, \% |
texture |
the soil texture group. See exemples |
The function returns 0 for soil properties values beyond the range for which the function was built.
PC |
the precompression stress |
Renato Paiva de Lima <renato_agro_@hotmail.com> Anderson Rodrigo da Silva <anderson.agro@hotmail.com>
Saffih-Hdadi, K.; Defossez, P.; Richard, G.; Cui, Y. J.; Tang, A. M.; Chaplain, V, 2009. A method for predicting soil susceptibility to the compaction of surface layers as a function of water content and bulk density Geoderma, 115: 96-103.
# EXAMPLE 1 soilStrength3(bulk.density=1.1, water.content=40, texture="VeryFine") soilStrength3(bulk.density=1.2, water.content=20, texture="Fine") soilStrength3(bulk.density=1.3, water.content=15, texture="MediumFine") soilStrength3(bulk.density=1.4, water.content=15, texture="Medium") soilStrength3(bulk.density=1.5, water.content=10, texture="Coarse") # End (not run)
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