Explanation:

- Black soil is mostly found in the Deccan Plateau, not in the northern plains. It is rich in iron and suitable for cotton cultivation.

- Yellow soil is common in regions with moderate rainfall and primarily found in some parts of southern and western India.

- Arid soil is found in desert areas, like Rajasthan, and not suitable for agriculture without irrigation.

- Alluvial soil is predominant in the northern plains of India. It is fertile and supports agriculture, formed by sediments deposited by rivers like the Ganges and Yamuna.