Estimation of compressive properties by Keller and Arvidsson (2007)
It calculates the compressive parameters N and lambda using the pedo-transfer function from Keller and Arvidsson (2007)
compressive_properties2(particle.density, bulk.density)
particle.density |
a numeric vector containing the values of particle density, Mg m^{-3} |
bulk.density |
a numeric vector containing the values of bulk density, Mg m^{-3} |
In Keller and Arvidsson (2007), the recompression index, kappa, was found as 0.042 for all soil.
N |
the specific volume at p = 1 kPa, N |
CI |
the compression index, lambda |
Renato Paiva de Lima <renato_agro_@hotmail.com> Anderson Rodrigo da Silva <anderson.agro@hotmail.com>
Keller, T., Arvidsson, J., 2007. Compressive properties of some Swedish and Danish structured agricultural soils measured in uniaxial compression tests. European Journal of Soil Science , 58: 1373-1381.
# EXAMPLE 1 compressive_properties2(particle.density=2.65, bulk.density=1.5) # EXAMPLE 2 BD <- seq(from=1.2,to=1.8, by=0.01) # range of bulk density from 1.2 to 1.8 out <- compressive_properties2(particle.density=2.65, bulk.density=BD) plot(x=BD,y=out$N, ylab="N", xlab="Bulk density") # for N plot(x=BD,y=out$CI, ylab="Compression index (CI)", xlab="Bulk density") # for compression index # End (not run)
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