The correct answer is: Rainfed irrigation.
Chhattisgarh is a state in central India with a tropical climate. The state receives an average annual rainfall of 1,100 mm, which is concentrated in the monsoon season from June to September. The rest of the year, the state experiences a dry climate.
Rainfed irrigation is the practice of irrigating crops using rainwater. It is the most common form of irrigation in Chhattisgarh, accounting for over 80% of the state’s irrigated area. Rainfed irrigation is a low-cost and sustainable method of irrigation, but it is also a risky method, as crop yields can vary significantly from year to year depending on the amount of rainfall.
Extensive canal networks are not a significant source of irrigation in Chhattisgarh. The state has a small number of canals, which are mostly used to irrigate crops in the northern part of the state.
Drip irrigation is a modern method of irrigation that uses small pipes to deliver water directly to the roots of plants. It is a more efficient method of irrigation than rainfed irrigation or canal irrigation, but it is also more expensive.
Traditional water harvesting methods are a variety of methods that have been used for centuries to collect and store rainwater. These methods include building tanks, dams, and ponds, and digging wells. Traditional water harvesting methods are still used in some parts of Chhattisgarh, but they are not a significant source of irrigation for the state.