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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.
- a)trickle irrigation
- b)furrow irrigation
- c)border irrigation
- d)sub irrigation
Correct answer is option 'D'. Can you explain this answer?
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In an irrigation system, water was delivered to the field in ditches s...
When a system of open jointed drains is artificially laid below the soil, so as to supply water to the crops by capillarity, then it is known as artificial sub-irrigation. It may be recommended only in some special cases with favourable soil conditions and for cash crops of high return.
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In an irrigation system, water was delivered to the field in ditches s...
Sub Irrigation
Sub irrigation is a method of irrigation where water is delivered to the field through ditches spaced at regular intervals. The water is allowed to seep into the ground and maintain the water table at such a height that it is available to the crops through the capillary fringe. This method of irrigation is also known as seepage irrigation or controlled submergence irrigation.
How does sub irrigation work?
Sub irrigation works by utilizing the capillary action of the soil to deliver water to the crops. In this method, the field is divided into several plots or sections, and each section is surrounded by ditches. The ditches are spaced about 30 meters apart. Water is delivered to these ditches either by gravity flow or through a network of pipes.
Advantages of sub irrigation:
- Efficient water use: Sub irrigation allows for efficient water use as the water is directly delivered to the root zone of the plants. This reduces water loss due to evaporation and runoff.
- Reduced weed growth: Since the water is delivered directly to the root zone, there is less water available on the soil surface for weed growth. This helps in reducing weed competition with the crops.
- Reduced soil erosion: Sub irrigation helps in reducing soil erosion as the water is delivered slowly and evenly to the soil. This prevents the soil from being washed away by surface runoff.
- Reduced nutrient leaching: As the water is delivered directly to the root zone, there is less leaching of nutrients below the root zone. This helps in reducing nutrient loss and ensures better nutrient uptake by the crops.
Limitations of sub irrigation:
- High initial cost: The installation cost of a sub irrigation system can be high compared to other irrigation methods. It requires the construction of ditches or pipes and a well-designed drainage system.
- Limited control: Sub irrigation relies on the natural capillary action of the soil, which can be influenced by soil type, texture, and structure. This limits the control over the amount and distribution of water delivered to the crops.
- Site-specific suitability: Sub irrigation may not be suitable for all types of soils and crops. It requires suitable soil conditions that allow for efficient water movement through capillary action.
Overall, sub irrigation is a method of irrigation that utilizes the natural capillary action of the soil to deliver water to crops. It offers advantages such as efficient water use, reduced weed growth, and reduced soil erosion. However, it also has limitations such as high initial cost and limited control over water distribution.
Sub irrigation is a method of irrigation where water is delivered to the field through ditches spaced at regular intervals. The water is allowed to seep into the ground and maintain the water table at such a height that it is available to the crops through the capillary fringe. This method of irrigation is also known as seepage irrigation or controlled submergence irrigation.
How does sub irrigation work?
Sub irrigation works by utilizing the capillary action of the soil to deliver water to the crops. In this method, the field is divided into several plots or sections, and each section is surrounded by ditches. The ditches are spaced about 30 meters apart. Water is delivered to these ditches either by gravity flow or through a network of pipes.
Advantages of sub irrigation:
- Efficient water use: Sub irrigation allows for efficient water use as the water is directly delivered to the root zone of the plants. This reduces water loss due to evaporation and runoff.
- Reduced weed growth: Since the water is delivered directly to the root zone, there is less water available on the soil surface for weed growth. This helps in reducing weed competition with the crops.
- Reduced soil erosion: Sub irrigation helps in reducing soil erosion as the water is delivered slowly and evenly to the soil. This prevents the soil from being washed away by surface runoff.
- Reduced nutrient leaching: As the water is delivered directly to the root zone, there is less leaching of nutrients below the root zone. This helps in reducing nutrient loss and ensures better nutrient uptake by the crops.
Limitations of sub irrigation:
- High initial cost: The installation cost of a sub irrigation system can be high compared to other irrigation methods. It requires the construction of ditches or pipes and a well-designed drainage system.
- Limited control: Sub irrigation relies on the natural capillary action of the soil, which can be influenced by soil type, texture, and structure. This limits the control over the amount and distribution of water delivered to the crops.
- Site-specific suitability: Sub irrigation may not be suitable for all types of soils and crops. It requires suitable soil conditions that allow for efficient water movement through capillary action.
Overall, sub irrigation is a method of irrigation that utilizes the natural capillary action of the soil to deliver water to crops. It offers advantages such as efficient water use, reduced weed growth, and reduced soil erosion. However, it also has limitations such as high initial cost and limited control over water distribution.
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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.a)trickle irrigationb)furrow irrigationc)border irrigationd)sub irrigationCorrect answer is option 'D'. Can you explain this answer?
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