On choosing my semivariogram estimators to model a range of soil parameters I
was reminded of a question which was debated some time ago (Sep97). "The use
of spherical models are being actively discouraged". A paper by Mardia &
Watkings (1989) in Biometrika and one by McBratney & Webster (1986) J Soil Sci
discuss this . In my limited experience spherical models are still commonly
used. Would someone like to try and explain this ambiguity to me please? (The
simpler the better!).
Thanks in advance
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