The colour of soil samples is specified by Munsell soil chart method [52 54].
Humboldt was unlike anybody else because he was able to remember even the smallest details for years: the shape of a leaf, the colour of soil, a temperature reading, the layering of a rock.
forest, a field experiment was designed to evaluate post-fire seed predation as affected by combinations of seed colour and soil substrates: light grey and black seeds combined with light grey ash, dark grey ash and pale brown sand.
Standard analyses examine the intrinsic properties of soils, including mineralogy, geophysics, texture and colour; however, soils can also support a vast amount of organisms, which can be examined using DNA fingerprinting techniques.
The indigenous colour-based soil quality classification was successfully integrated into the Trenbath FALLOW soil module.
In the case of bare ground the surface albedo calculation requires only the soil colour, which varies with the colour class (soil colour index).
To avoid a discontinuity in the soil colour map, the soil colour change is gradually performed with a small change of 50% at the edge of the Sahara array (soil colour index = 15) and a maximal change in the center of the array (soil colour index = 20) as shown in Figure 1.
For Ethiopian condition, Hurni (1985) developed K determination based on soil colour estimated by Mansell colour chart (Table 1).
Darker blue colours denote soils that contain more than 40% water.
(a) soil colour index of the control run, (b) soil colour index of the perturbed run, (c) difference between the soil colour indices of the perturbed and the control run.
This study is helpful to develop a relationship between NDVI and soil colour so as to establish assessment of soil colour using satellite data, which in turn could be used to predict the erosion process in any area.
