a. Red soil develops on crystalline igneous rocks in areas of low rainfall in
the eastern and southern parts of the Deccan plateau.
b. It is red in colour due to the diffusion of iron in crystalline and
metamorphic rocks. It looks yellow when it occurs in a hydrated form.
c. Red soils are highly porous and fertile and they are fine grained and deep.
d. It is deficient in phosphoric acid, organic matter and nitrogen and rich in potash.
e. They occur in parts of Tamil Nadu, Karnataka, Andhra Pradesh, Orissa and Jharkhand.