Red Soils: These soils are found in Chotta Nagpur plateau, Telangana, Nilgiris, Tamil Nadu, Karnataka, Andhra Pradesh and areas on periphery of Deccan Plateau. These soils have been formed due to decomposition of underlying igneous rocks under heavy rainfall. These soils have different shades of red and yellow. The red colour of these soils is due to oxidation and diffusion of iron in hard crystalline rocks. These are used for the cultivation of millets, pulses, linseed, tobacco, etc. These soils cover the largest area (10.6%) in Peninsular India, particularly S.E. part of the Peninsula. These soils are poor in lime, nitrogen and humus. Fertilizers are added to make these fertile.
