In which one of the following pairs is the specific characteristic of a soil not correctly matched?

Explanation

Black soil forms the largest group. Black soils, also known as regosols or black clay soils, are typically not rich in calcium carbonate. Instead, these soils are characterized by their high clay content, dark color, and rich organic matter. Black soils are often found in various parts of the world and are known for their fertility and suitability for agriculture. It is developed mainly on the Deccan traps of Maharashtra, Madhya Pradesh and Kathiawar. Because of its hydrology and climatic conditions of the environment, the medium and deep black soils are very suitable for cotton cultivation.