compressive_properties {soilphysics} | R Documentation |
Estimation of compressive properties by Defossez et al. (2003)
Description
It calculates the compressive parameters N and lambda using the pedo-transfer function from Defossez et al. (2003)
Usage
compressive_properties(water.content, soil=c("Loess", "Calcareous"))
Arguments
water.content |
a numeric vector containing the values of gravimetric water content, |
soil |
the soil group 'Loess' or 'Calcareous'. See examples |
Details
In Defossez et al. (2003), the recompression index, kappa, was assumed as 0.0058 for both soil group.
Value
N |
the specific volume at |
CI |
the compression index, lambda |
Author(s)
Renato Paiva de Lima <renato_agro_@hotmail.com> Anderson Rodrigo da Silva <anderson.agro@hotmail.com>
References
Defossez, P., Richard, G., Boizard, H., & O'Sullivan, M. F., 2003. Modeling change in soil compaction due to agricultural traffic as function of soil water content. Geoderma, 116: 89–105.
See Also
Examples
# EXAMPLE 1 - For Loess and Calcareous soil
water.content <- 25
compressive_properties(water.content=water.content, soil="Loess")
compressive_properties(water.content=water.content, soil="Calcareous")
# EXAMPLE 2 - For Loess soil
water.content <- seq(from=5,to=30,len=20)
out <- compressive_properties(water.content=water.content, soil="Loess")
plot(x=water.content ,y=out$N, ylab="N", xlab="Bulk density") # plot for N
plot(x=water.content ,y=out$CI, ylab="Lambda", xlab="Bulk density") # plot for compression index
# EXAMPLE 3 - For Calcareous soil
water.content <- seq(from=5,to=30,len=20)
out <- compressive_properties(water.content=water.content, soil="Calcareous")
plot(x=water.content ,y=out$N, ylab="N", xlab="Bulk density") # plot for N
plot(x=water.content ,y=out$CI, ylab="Lambda", xlab="Bulk density") # plot for compression index
# End (not run)
[Package soilphysics version 5.0 Index]