Which of the following is/are the advantage /advantages of practising drip irrigation? 1. Reduction in weed 2. Reduction in soil salinity 3. Reduction in soil erosion Select the correct answer using the code given below.
1 and 3 only
Understanding Drip Irrigation Advantages
Drip irrigation is a highly efficient irrigation method that delivers water directly to the root zone of plants through a network of valves, pipes, tubing, and emitters. This method offers several benefits compared to traditional irrigation techniques like flood or furrow irrigation, or even sprinklers.
Analysing Potential Advantages of Drip Irrigation
Let's examine each statement provided in the question regarding the advantages of practicing drip irrigation:
- Reduction in weed: Drip irrigation supplies water only to the immediate vicinity of the cultivated plants. The spaces between rows or plants remain dry. Weeds require water to grow, just like crops. By keeping the inter-row spaces dry, drip irrigation significantly reduces the amount of water available for weed germination and growth. This leads to a natural reduction in weed population and biomass, decreasing the need for manual or chemical weed control. Therefore, this statement is generally considered a significant advantage of drip irrigation.
- Reduction in soil salinity: The impact of drip irrigation on soil salinity can be complex and depends on several factors, including water quality, soil type, and irrigation management. Drip irrigation applies water slowly, which can push salts away from the immediate root zone towards the periphery of the wetted area. This can help maintain a lower salt concentration in the root zone where the plant absorbs water. However, if the irrigation water has high salinity, or if sufficient water is not applied to periodically leach accumulated salts, salinity can build up at the edges of the wetted zone or even in the root zone over time. While it manages salinity within the root zone more effectively than some other methods in certain conditions, stating a universal "reduction in soil salinity" as a primary advantage might be an oversimplification. Other methods like leaching are more directly aimed at overall soil salinity reduction.
- Reduction in soil erosion: Soil erosion is often caused by the force of water moving over the soil surface, picking up and carrying away soil particles. Drip irrigation applies water directly to the soil surface or subsurface at a low flow rate, allowing it to infiltrate slowly. Unlike flood irrigation, furrow irrigation, or even high-intensity sprinkler irrigation, drip irrigation does not involve significant surface runoff or turbulent water flow. This minimal surface disturbance drastically reduces the risk of soil erosion, especially on sloped lands. This is a major environmental and agricultural advantage of drip irrigation.
Identifying the Correct Advantages
Based on the analysis:
- Statement 1 (Reduction in weed) is a clear advantage because drip irrigation restricts water availability to inter-row spaces.
- Statement 3 (Reduction in soil erosion) is a clear advantage because drip irrigation involves minimal surface water flow.
- Statement 2 (Reduction in soil salinity) is not a universal or primary advantage in all conditions and can be context-dependent regarding management and water quality.
Therefore, the advantages among the given options are the reduction in weed growth and the reduction in soil erosion.
Summary of Advantages
The advantages of practicing drip irrigation from the given statements are 1 and 3.
| Statement | Potential Advantage? | Explanation |
|---|---|---|
| 1. Reduction in weed | Yes | Water applied only near plants, leaving inter-row dry. |
| 2. Reduction in soil salinity | Context-Dependent / Not Primary Universal Advantage | Manages root zone salinity, but overall reduction depends on water quality and management; salts can accumulate at periphery. |
| 3. Reduction in soil erosion | Yes | Low flow rate, no surface runoff or turbulence. |
Revision Table: Key Aspects of Drip Irrigation
| Aspect | Description |
|---|---|
| Water Delivery | Directly to root zone |
| Water Efficiency | High (minimal evaporation/runoff) |
| Weed Growth | Reduced (dry inter-row) |
| Soil Erosion | Reduced (low surface flow) |
| Fertilizer Application (Fertigation) | Possible and efficient (directly to root zone) |
| Initial Cost | Generally higher than surface irrigation |
Additional Information: Benefits and Considerations of Drip Irrigation
Beyond weed reduction and soil erosion control, drip irrigation offers several other significant benefits:
- Increased Water Use Efficiency: Water is applied precisely where needed, significantly reducing water loss through evaporation, runoff, or deep percolation compared to other methods.
- Improved Crop Yield and Quality: Plants receive a consistent and optimal moisture supply in the root zone, leading to healthier growth, higher yields, and better quality produce.
- Efficient Nutrient Use (Fertigation): Soluble fertilizers can be injected directly into the irrigation water and delivered to the root zone (fertigation), allowing for precise nutrient application and uptake, reducing fertilizer waste and potential environmental pollution.
- Reduced Labour Costs: Once installed, drip systems require less labour for irrigation management compared to manual methods.
- Adaptability: Drip irrigation can be successfully implemented on various topographies (including uneven terrain and slopes) and soil types.
However, there are also considerations:
- Initial Cost: Setting up a drip irrigation system can have a higher initial investment compared to simpler methods.
- Clogging of Emitters: Emitters can get clogged by sediments, chemicals (like precipitated minerals), or organic matter, requiring maintenance.
- Salinity Management: As discussed, while it manages root zone salinity well, overall salinity reduction is not a guaranteed outcome and requires careful management, especially with poor quality water.
Understanding these aspects provides a comprehensive view of drip irrigation's role in modern agriculture and landscaping.
Important Questions from Agriculture
Consider the following States:
1. Arunachal Pradesh
2. Kerala
3. Himachal Pradesh
4. Tripura
How many of the above are generally known as tea- producing States?
How is permaculture farming different from conventional chemical farming?
1. Permaculture farming discourages monocultural practices but in conventional chemical farming, monoculture practices are predominant.
2. Conventional chemical farming can cause an increase in soil salinity but the occurrence of such phenomenon is not observed in permaculture farming.
3. Conventional chemical farming is easily possible in semi-arid regions but permaculture farming is not so easily possible in such regions.
4. Practice of mulching is very important in permaculture farming but not necessarily so conventional chemical farming
Select the correct answer using the code given below.
With reference to ‘palm oil’, consider the following statements:
1. The palm oil tree is native to Southeast Asia.
2. Palm oil is a raw material for some industries producing lipstick and perfumes.
3. Palm oil can be used to produce biodiesel.
Which of the statements given above are correct?
In the context of India’s preparation for Climate-Smart Agriculture, consider the following statements :
1. The ‘Climate-Smart Village’ approach in India is a part of a project Jed by the Climate Change, Agriculture and Food Security (CCAFS), an international research programme.
2. The project of CCAFS is carried out under Consultative Group on ‘International Agricultural Research (CGIAR) headquartered in France.
3. The International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) in India is one of the CGIAR’s research centres.
Which of the statements given above are correct?
With reference to 'Initiative for Nutritional Security through Intensive Millets Promotion', which of the following statements is/are correct?
1. This initiative aims to demonstrate the improved production and post-harvest technologies, and to demonstrate value addition techniques, in an integrated manner, with cluster approach.
2. Poor, small, marginal and tribal farmers have larger stake in this scheme.
3. An important objective of the scheme is to encourage farmers of commercial crops to shift to millet cultivation by offering them free kits of critical inputs of nutrients and microirrigation equipment.
Select the correct answer using the code given below.
