# soilStrength3: Estimation of precompression stress by Saffih-Hdadi et al.... In soilphysics: Soil Physical Analysis

## Description

It calculates the precompression stress using the pedo-transfer function from Saffih-Hdadi et al. (2009)

## Usage

 ```1 2 3``` ``` soilStrength3(bulk.density, water.content, texture=c("VeryFine","Fine","MediumFine","Medium","Coarse")) ```

## Arguments

 `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

## Details

The function returns 0 for soil properties values beyond the range for which the function was built.

## Value

 `PC` the precompression stress

## Author(s)

Renato Paiva de Lima <renato_agro_@hotmail.com> Anderson Rodrigo da Silva <anderson.agro@hotmail.com>

## References

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.

`stressTraffic`

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10``` ``` # 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) ```

soilphysics documentation built on Jan. 13, 2021, 7:06 p.m.