Black Soil Geography and Properties

Black soil, also known as Regur soil, is a significant soil type found in India, characterized by specific geographical distribution and properties.

Option Analysis

• Statement 1: It covers most of the Deccan Plateau.

  This statement is correct. Black soil is predominantly found across the vast expanse of the Deccan Plateau, including regions like Maharashtra, Gujarat, Madhya Pradesh, and parts of Andhra Pradesh and Karnataka. It typically forms from the weathering of basaltic lava flows.

• Statement 2: It is the least fertile of all soil types.

  This statement is incorrect. Black soils are generally considered highly fertile, especially suitable for growing crops like cotton, hence the name 'black cotton soil'. They possess good water retention capabilities.

• Statement 3: It covers most of the North Indian Gangetic Plain.

  This statement is incorrect. The North Indian Gangetic Plain is primarily characterized by alluvial soils, which are deposited by the Indus, Ganges, and Brahmaputra river systems. Black soil is not the dominant soil type in this region.

• Statement 4: Black soils are rich in phosphorus, nitrogen.

  This statement is incorrect. While black soils are rich in essential nutrients like lime, magnesium, potash, and alumina, they are often naturally deficient in phosphorus and nitrogen. These nutrients typically need to be supplemented for optimal crop yield.

Conclusion

Based on the analysis, the only correct statement regarding black soil is its extensive coverage over the Deccan Plateau.