Which soil is known as self-ploughing soil?

"Black cotton soil," also known as "regur soil" or "self-ploughing soil," is the type of soil that is often referred to as self-ploughing. This type of soil is found in certain regions of the world, including parts of India. It is known for its unique property of shrinking and swelling with changes in moisture content. When dry, it contracts and forms deep cracks; when wet, it swells and becomes compact. This action creates a self-ploughing effect, which can disrupt structures built on it and make farming challenging. Despite its challenges, black cotton soil can be quite fertile and suitable for certain types of crops.