Cielab color parameters and their relationship to soil characteristics in mediterranean red soils
1997
Sánchez-Marañón, M. | Delgado, G. | Melgosa, M. | Hita, E. | Delgado, R.
CIELAB color parameters L*, C*ab, hab and 〈ΔE*ab〉 in aggregate surface, aggregate core, and crushed soil samples from 19 Mediterranean red soils were studied. The relationship between these color parameters and other soil characteristics was examined. Color parameters in aggregate samples were significantly different (ANOVA) from those in crushed samples although, according to a factor analysis, the color parameters in these two soil sample types were related. This factor analysis also showed hab (hue-angle) and L* (lightness) in aggregates to be master variables for two factors, which accounted for 77.2% of the total variance in color parameters. The pedoenvironmental variables-soil horizon, altitude, slope, vegetation, and soil moisture regime-were sources of variation (ANOVA) in soil color parameters. Texture, organic carbon content, cation exchange capacity, and mineralogical composition in fine earth and clay fraction were the analytical characteristics correlated most strongly with soil color. CIELAB color parameters L* and hab (which, as Munsell value and hue, represent the color perception attributes lightness and hue) in soil aggregate samples were shown to be very useful for defining and characterizing color in Mediterranean red soils because of their relationship with the soil characteristics studied.
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