engleski

Geostatistical model evaluation for soil tillage suitability II

This paper presents the development of a computer model for estimation of suitability for soil tillage in eastern Croatia. Model are based on GIS geostatistical analyses of physico-chemical data of Interpretative base of soil resources of Osijek-Baranja county, which currently accounts 24 536 soil samples with over 1, 000, 000 soil information. As a cartographic basis, but also a source of data were used the Croatian soil map in digital form, and the data of size and position of agricultural land units (parcels) have been taken from ARKOD. Previous model of soil tillage suitability has been upgraded and now uses seven indicators of suitability of which four are determined exactly (pH, humus content, plot size and elevation), soil type and type of wetting (automorphic and hydromorphic) are taken from the Digital Soil Map of the Republic of Croatia as and the rank of general workability which is an inherent property of each pedosystemic units. Required power or Power Index is calculated from the 3D function whose variable concentrations of humus and soil bulk density, while the geographical position and elevation used for estimation of the plot slope, average annual temperature and rainfall. The model calculated the average relative workability of land 59.75% (min. 35.82, max. 89.78%) and the total number of samples in the interpretive basis of land resources Osijek- Baranja County, 5.82% are in the class S1 ; 27.57% in S2 ; 66.49% in S3, and only 0.11% are in class N1 or N2, which is not suitable for soil tillage.

Geostatistical model ; soil tillage ; soil suitability

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