SOILS AND NATURAL VEGETATION
SOILS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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____ soil is dark in colour .
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Black
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Mountain
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Desert
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none of above
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Explanation:
Detailed explanation-1: -Soil colour is usually due to 3 main pigments: black-from organic matter. red-from iron and aluminium oxides. white-from silicates and salt.
Detailed explanation-2: -Black soil is derived from basalt rocks, which gives them the black or grey colour. It is made up of clayey material, and is extremely fine. Black soil is well-known for its moisture-holding capacity.
Detailed explanation-3: -Black soils are usually high in organic matter, but high is relative. Some black soils test relatively low in organic matter and relatively high in mineral content. Others occupy the other end of the spectrum-squishy black muck that can contain up to 50 percent organic matter.
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