Select the correct option to test your answer: A Application of water at the time of harvesting crops like colocasia, tapioca and yam B Harvesting deep water from soils by pumping devices C Unit of water applied to crops D Collecting the excess run off from rain on the farm in ponds and utilizing it later for agriculture Correct Answer: Option D (Collecting the excess run off from rain on the farm in ponds and utilizing it later for agriculture) Verified correct option for Agriculture (Agronomy).