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Vegetation & Soils
The nine major types of soils are largely dominated by sands and clays
which have been reworked and mixed by the action of water and wind.
Their potential for crop cultivation is low in most areas for several
reasons: poor water-holding capacity, low nutrient content, high salt
content and hard layers of clay below the surface. Most plants
characteristically grow on certain types of soils, so those in the
eastern and western Kalahari sands are quite different from those in the
Cuvelai and other landscapes. Thirty-five different vegetation types are
recognised and described.
Mopane and various other
trees provide important sources of wood, used predominantly for housing,
fencing and fuel. Large areas have been deforested as a result of the
heavy demands for wood. Fruit and many other products are harvested,
which are of greatest value to the poorest people. Grasses and shrubs
feed large numbers of domestic stock, but high grazing pressures in the
Cuvelai and elsewhere have probably resulted in a reduction in the
availability and quality of pastures. In the Tsumeb area, many farms
have become badly encroached by dense thickets, making the farms much
less productive for cattle ranching than they were before.
Illustrations:
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Distribution of soil
types
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Suitability of soils for
crop cultivation
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Concentrations of salts
in the soil
-
Distribution of
different vegetation types
-
Woodland resource values
-
Plant diversity values
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Maximum biomass for six
growing seasons
-
Distribution and numbers
of fires burnt over five years
-
Levels of bush
encroachment around Tsumeb
To
view the illustration in more detail, click on the thumbnail.
Distribution
of soil types (150 KB)
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Suitability of soils for
crop cultivation (187 KB)
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Concentrations
of salts in the soil (138 KB)
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jpg image
Distribution
of different vegetation types (279 KB)
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Woodland
resource values (117 KB)
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Plant
diversity values (106 KB)
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Maximum
biomass for six growing seasons, 1993/4 - 1998/9 (306 KB)
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Distribution
and numbers of fires burnt over five years. 1994 - 1998 (93 KB)
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image
Levels
of bush encroachment around Tsumeb (86 KB)
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