Estimate key parameters for building a mass-preserving spline across a single soil profile
mpspline_est1(s = NULL, var_name = NULL, lam = NULL)A list of parameters used for spline fitting.
data.frame containing a single profile's worth of soil info
character or integer vector denoting the column(s) in
site in which target data is stored. If not supplied, the fourth
column of the input object is assumed to contain the target data.
number; smoothing parameter for spline. Defaults to 0.1.