A comparison of kriging, cubic splines and classification for predicting soil properties from sample information

A - Papers appearing in refereed journals

Voltz, M. and Webster, R. 1990. A comparison of kriging, cubic splines and classification for predicting soil properties from sample information. Journal of Soil Science. 41 (3), pp. 473-490.

AuthorsVoltz, M. and Webster, R.
Abstract

SUMMARY The clay content of the topsoil in two regions of contrasting physiography was predicted from sample data using four different procedures. The predictors were the means of mapped classes, the usual kriging estimator, a cubic spline interpolator and a kriging estimator within classes using a pooled within-class variogram. The performances of the procedures were evaluated and compared. In the first region, Sandford St Martin on Jurassic sediments where there were some abrupt changes in soil, the classification predicted best within those classes bounded by sharp change. Elsewhere the usual kriging performed somewhat better, and kriging within classes was still more precise. In the second region, Yenne on the alluvial plain of the Rhone where the soil varied gradually, kriging performed better than classification, though a small improvement resulted from combining kriging with classification. Both prediction by class means and kriging attempt to minimize the estimation variance, and their mean prediction variances were close to the theoretical values overall. Spline interpolation is more empirical, and though it followed the abrupt changes better than kriging, it fluctuated excessively elsewhere, and its overall performance was poorer than that of kriging.

Year of Publication1990
JournalJournal of Soil Science
Journal citation41 (3), pp. 473-490
Digital Object Identifier (DOI)doi:10.1111/j.1365-2389.1990.tb00080.x
Open accessPublished as non-open access
Publication dates
Print01 Sep 1990
Publication process dates
Accepted16 Mar 1990
PublisherWiley
British Society of Soil Science (BSSS)
Copyright licensePublisher copyright
ISSN0022-4588

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