soilStrength5 {soilphysics}

Estimation of precompression stress by Imhoff et al. (2004)

Description

It calculates the soil strength using precompression stress using the pedo-transfer function from Imhoff et al. (2004)

Usage

 
soilStrength5(bulk.density,  water.content, clay.content)

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 water content, (g/g)

clay.content

a numeric vector containing the values of clay content, \%

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 <[e-mail]> Anderson Rodrigo da Silva <[e-mail]>

References

Imhoff, S., Da Silva, A. P., Fallow, D. (2004) Susceptibility to Compaction, Load Support Capacity, and Soil Compressibility of Hapludox. Soil Science Society of America Journal, 68: 17-24.

See Also

stressTraffic

Examples

# EXAMPLE 1

soilStrength5(clay.content=60, water.content=0.30, bulk.density=1.25)
soilStrength5(clay.content=35, water.content=0.23, bulk.density=1.40)
soilStrength5(clay.content=20, water.content=0.10, bulk.density=1.60)


# EXAMPLE 2
water.content <- seq(0.1,0.30,len=20) # range of water content from 0.1 to 0.30 (g g^-1)
out <- soilStrength5(clay.content=20, water.content=water.content , bulk.density=1.60)
plot(x=water.content,y=out, 
     ylab="Precompression stress (kPa)", xlab="Water content")


# End (not run)