Estimation of precompression stress by Imhoff et al. (2004)
It calculates the soil strength using precompression stress using the pedo-transfer function from Imhoff et al. (2004)
soilStrength5(bulk.density, water.content, clay.content)
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, \% |
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>
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.
# 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")
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