Correct Answer - Option 4 : Capillary fringe reaches the root zone of the plant
Concept:
Waterlogging:
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Waterlogging occurs when there is too much water in a plant’s root zone, which decreases the oxygen available to roots and Capillary fringe reaches the root zone of the plant.
- Waterlogging can be a major constraint to plant growth and production and, under certain conditions, will cause plant death.
- This constraint may not be apparent until the whole soil profile is saturated and water appears on the surface.
- The department provides landholders with technical information and support on management options to recognize and reduce the impacts of waterlogging.
Causes of waterlogging:
1) Over-irrigation
2) Seepage from canals
3) Inadequate surface drainage
4) Obstruction in a natural watercourse
5) Obstruction in subsoil drainage
6) Incorrect method of cultivation
Remedial measures adopted for the prevention of waterlogging are:
1. Efficient surface drainage
2. Under-drainage by tie drains
3. Reducing Percolation from canals
4. Restriction of Irrigation
5. The lining of water resources
6. Removing obstruction in natural drainage
7. Prevention of seepage from water reservoirs
