Which one among the following is not correct regarding the black soils of Peninsular India?

Black soils, also known as Regur or 'tropical chernozems', are typical of the Deccan trap region and are formed from weathered Cretaceous lava [2]. These soils are characterized by a clayey texture and are highly retentive of moisture, swelling when wet and developing deep cracks when dry [1]. Chemically, black soils are rich in iron, lime, calcium, potassium, and magnesium [1]. However, they are consistently described as being deficient in nitrogen, phosphorus, and organic matter (humus) [3]. While they are famous for cotton cultivation, they are also fertile and well-suited for growing other crops like sugarcane, pulses, and citrus fruits [3]. Therefore, the statement claiming that black soils are rich in phosphorus and organic matter is incorrect, as these are the primary nutrients they lack.

Sources

1. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 6: Soils > 3. Black or Regur Soils > p. 11
2. [2] NCERT. (2022). Contemporary India II: Textbook in Geography for Class X (Revised ed.). NCERT. > Chapter 1: The Rise of Nationalism in Europe > Black Soil > p. 9
3. [3] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 6: Soils > Table 6.1 > p. 7