widths (= c(300,700,1000,2000)
: Width of soil layers (in mm).
clay (= 25)
: Clay percentage for each layer (in %).
sand (= 25)
: Sand percentage for each layer (in %).
om (= NA)
: Organic matter percentage for each layer (in %).
bd (= 1.5)
: Bulk density for each layer (in g/cm3).
rfc (= c(20,40,60,85))
: Percentage of rock fragment content for each layer.