The correct answer is: C. Medium soil
The State Government of Haryana is promoting dry land farming for the improvement of medium soil. This is because medium soil is the most suitable type of soil for dry land farming. It has the right balance of sand, silt, and clay, which allows it to hold water and nutrients well. It is also not too heavy or too light, which makes it easy to work with.
Extremely light soil is not suitable for dry land farming because it does not hold water or nutrients well. Light soil is also not ideal for dry land farming, but it is better than extremely light soil. Medium soil is the best type of soil for dry land farming because it has the right balance of sand, silt, and clay. It holds water and nutrients well, and it is not too heavy or too light.
Generally heavy soil is not suitable for dry land farming because it is too heavy and does not hold water well. It is also difficult to work with.