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Question
In an irrigation system, water was delivered to the field in ditches spaced about 30 m apart and was allowed to seep into the ground to maintain the water table at such a height that the water is available to the crops through the capillary fringe. This method of irrigation is called
In an irrigation system, water was delivered to the field in ditches spaced about 30 m apart and was allowed to seep into the ground to maintain the water table at such a height that the water is available to the crops through the capillary fringe. This method of irrigation is called
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Solution
The correct option is D Sub-surface irrigation
Sub-surface irrigation - In this method, water is applied beneath the land surface. The subsurface irrigation can be classified as
- Natural subsurface irrigation: Leakage water from sources of water such as streams, lakes, ponds, canals, etc. goes underground and during the passage to the subsoil, it may irrigate crops by capillarity.
- Artificial subsurface irrigation: In this method, water is applied beneath the land surface through a network of buried perforated or open jointed pipes. As water is passed under pressure in these pipes, it comes out through open joints. Evaporation losses are reduced.
Sub-surface irrigation - In this method, water is applied beneath the land surface. The subsurface irrigation can be classified as
- Natural subsurface irrigation: Leakage water from sources of water such as streams, lakes, ponds, canals, etc. goes underground and during the passage to the subsoil, it may irrigate crops by capillarity.
- Artificial subsurface irrigation: In this method, water is applied beneath the land surface through a network of buried perforated or open jointed pipes. As water is passed under pressure in these pipes, it comes out through open joints. Evaporation losses are reduced.
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