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International Journal of Soil Science

Year: 2008 | Volume: 3 | Issue: 2 | Page No.: 101-108
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Authors

A.A. Zolfaghari

M.A. Hajabbasi

Keywords

Research Article

Effect of Different Land Use Treatments on Soil Structural Quality and Relations with Fractal Dimensions

A.A. Zolfaghari and M.A. Hajabbasi
In this study, the feasibility of making the use of fractal dimension to quantify soil aggregate stability in different land use systems was investigated. For this purpose the non-linear fractal dimension (Dnl) and the Mean Weight Diameter (MWD) of aggregates were compared. In October 2005, soil samples from three sites with four adjacent land-use types namely: forest area (F), cultivated lands adjacent to forest (CAF), pasture (P) and cultivated lands adjacent to pasture (CAP) were collected. Cultivated pasture (CAP) had the largest value of Dnl, while pasture (P) had the smallest value of Dnl. Difference of Dnl between forest and pasture was not significant, while both of them significantly differed from that of cultivated forest (CAF) and cultivated pasture (CAP) in this parameter. There were significant differences between forest and pasture for the measured MWD. Coefficient of variations (CVs) between MWD and Dnl were also contrasted and the low value of CV indicated the higher precision of the method used. The lowest CVs belonged to Dnl, demonstrating that Dnl was more accurate than MWD methods. Fractal dimension had negative correlation with MWD, SOM, Hydraulic Conductivity (HC) and macroaggregates (>0.25 mm) and positive correlation with Bulk Density (BD) and Total Porosity (TP).
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