Regur, also known as black cotton soil, is a type of soil primarily found in the Deccan Plateau region of India. It is characterized by its dark color and high clay content, which makes it very fertile and suitable for growing cotton and other crops. The soil has excellent moisture retention properties, allowing it to support agriculture even in dry conditions. This soil type is formed from the weathering of volcanic rocks and is rich in minerals like iron, calcium, and magnesium. Regur is known for its ability to expand and contract with moisture changes, which can affect its structure. Proper management is essential to maintain its fertility and prevent erosion.