SOILS AND NATURAL VEGETATION
SOILS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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potash
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phosphoric acid
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lime and carbon compounds
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All of the above
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Detailed explanation-1: -Alluvial soil consists of silt, sand, clay, and gravel as well as much organic matter.
Detailed explanation-2: -Alluvial soil is deposited by flowing rivers. It is usually formed by mixing fine particles of various soils with salt and other minerals and contains animal and plant matter in a completely decomposed state. It contains moderate amounts of phosphoric acid, potassium salt and lime.
Detailed explanation-3: -The alluvial soil varies in nature from sandy loam to clay. They are rich in potash but poor in phosphorus.
Detailed explanation-4: -Alluvial soil is the most fertile soil because it has a loamy texture (contain sand, clay and slit) and is rich in humus, contains organic nutrients. A granular material composed of finely divided rock and mineral particles are called sand. Sand with clay and slit helps to increase fertility of alluvial soil.
Detailed explanation-5: -The proportion of nitrogen is generally low. The proportion of Potash, phosphoric acid and alkalies are adequate. The proportion of Iron oxide and lime vary within a wide range.