HORTICULTURE

Detailed explanation-1: -Groundwater not only allows farmers to irrigate in drier places but also offers certainty to farmers that water will be available when the rains fail. Groundwater supplies nearly half of water withdrawn for irrigation, 2 and the largest irrigated areas serviced by groundwater are in India, China, and the US (Figure 2).

Detailed explanation-2: -Explanation: Farming can be done without rain because there is not enough or rather no rain there at all to depend on drip irrigation. There are three main methods of irrigation are surface, sprinkler and drip/micro. Water flows over the soil by gravity for surface irrigation.

Detailed explanation-3: -The main sources for irrigation water are groundwater from wells, surface water, drainage ponds, rain and municipal water. Drilled wells are a clean source of water for many greenhouse operations however, the water yield from drilled wells is usually limited.