With reference to micro-irrigation, which of the following statements is/are correct?1. Fertilizer/nutrient loss can be reduced.2. It is the only means of irrigation in dryland farming.3. In some areas of farming, the receding of groundwater tables can be checked.Select the correct answer using the codes given below:
✓ Correct answer: c) 1 and 3 only
ExplanationMicro-irrigation is the slow distribution of water to the soil using surface drip and micro-sprinkler systems in the form of discrete or continuous drips, tiny streams, or miniature spray.Benefits of micro irrigation systems: Helps in water-saving and checking further depletion, Increased irrigation efficiency, Higher yields, Less water loss, Energy efficient, Lower consump- tion of fertilizers, Weed and disease reduction, Cost savings, Pre- cision farming.Statement 1 is correct: An efficient drip irrigation system re- duces the consumption of fertiliser through fertigation.Statement 2 is incorrect: Dryland farming is defined as the pro- duction of crops without irrigation in regions that receive rainfall of less than 500mm annually.Crop selection, Microcatchments and Runoff farming are some other methods of irrigation in dry- land farming.Statement 3 is correct: Micro-irrigation helps in water-saving and checking further groundwater depletion.60
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