| PTF19 | R Documentation |
PTF19 is a class PTF giving Mualem-van Genuchten parameters for combinations of USDA texture classes and topsoil/subsoil distinction.
data(PTF19)
A data frame with 12 observations on the following 9 variables.
thra numeric vector giving residual water content in Mualem-van Genuchten model
thsa numeric vector giving saturated water content in Mualem-van Genuchten model
alpa numeric vector giving parameter alpha (cm^(-1)) in Mualem-van Genuchten model
na numeric vector giving parameter n in in Mualem-van Genuchten model
ma numeric vector giving parameter m=1-1/n in Mualem-van Genuchten model
K0a numeric vector giving parameter K0 (cm d^(-1)) in Mualem-van Genuchten model
La numeric vector giving parameter L in Mualem-van Genuchten model
TOPSOILa character vector with values either "top" or "sub"
TEXT_USa character vector with values any of "C" (clay),"CL" (clay loam),"L" (loam),"LS" (loam Sand),"O"(organic),"S"(sand),"SC" (sand clay),"SCL" (sand clay loam),"Si" (silt),"SiC" (silt clay),"SiCL" (silt clay loam),"SiL" (silt loam),"SL" (sand loam)
Tóth Brigitta, Weynants Mélanie, Nemes Attila, Makó Andras, Bilas George and Tóth Gergely. 2014. New generation of hydraulic pedotransfer functions for Europe. European Journal of Soil Science. in Press.
predict.ptf, ChoosePTF,
ptf.data
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