Geography
Give geographical reasons for the following:
(a) Black soil is a residual soil.
(b) Red soils are generally infertile.
(c) Alluvial soil differs in texture.
Answer
(a) Black soil is a residual soil as it is formed at the place of its origin over the underlying rocks. It is formed by the denudation of volcanic rocks.
(b) Red soils are infertile due to low nutrient content, poor water-holding capacity, high acidity, and susceptibility to erosion.
(c) Alluvial soils differs in texture as in the upper reaches of the river valleys, the soil is dry, coarse, porous and sandy. Soil particles are large and non-uniform but as we move further down a river valley, the soil particles become smaller and more uniform. They are more compact and more moist.
Related Questions
Differentiate between alluvial and laterite soil.
Name the following:
(a) This soil is sticky when wet and cracks when dry.
(b) This soil is mainly used for making bricks.
(c) This soil is classified into khadar and bhangar.
(d) When heavy rainfall washes away the topmost layer of the soil.
What is Soil Conservation? Mention any two measures taken to conserve soil.
Mention any two characteristics of Tropical Evergreen forests.