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(Article of periodic en Anglais - 2009)

Document title

Accounting for extensive topographic and pedologic secondary information to improve soil mapping

Authors(s) and Affiliation(s)

CASTRIGNANÒ A. (1) ; COSTANTINI E.A.C. (2) ; BARBETTI R. (2) ; SOLLITTO D. (1) ;
(1) C.R.A.-SCA, Bari, ITALIE
(2) C.R.A.-ABP, Firenze, ITALIE

Abstract

The aim of this paper was to find the method that best improves the estimation of primary attributes through dense secondary information for the study area, the province of Siena in central Italy. Soil samples were taken at 742 locations and depth, sand and clay contents and available water capacity were determined. A multivariate geostatistical analysis was performed using the 4 soil properties and elevation from a digital elevation model of 20x20 m resolution as auxiliary variable. The variables were interpolated using 3 different approaches : cokriging, multicollocated cokriging, multicollocated simple kriging with local mean, estimated by averaging over the soil unit occurring at each node of the interpolation grid. These methods were compared in terms of precision, through cross validation, and of accuracy, through a validation test, using an independent data set of 170 soil depth measurements. The results did not show clear differences among the methods

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2009, vol. 77, no1 [pp. 28-38]

Bibliographic references : 0,5 p.

Collation : 10 fig., 6 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2008.12.004

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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