What are the advantages of fertigation in agriculture?1. Controlling the alkalinity of irrigation water is possible.2. Efficient application of Rock Phosphate and all other phosphatic fertilizers is possible.3. Increased availability of nutrients to plants is possible.4. Reduction in the leaching of chemical nutrients is possible.Select the correct answer using the code given below:
✓ Correct answer: c) 1, 3 and 4 only
ExplanationFertigation is a technique for applying fertilizer where the drip irrigation system incorporates the fertilizer into the irrigation water.In this technology, irrigation is used to evenly disperse fertiliser solutions.Fertigation is practised extensively in commercial agriculture and horticulture.Fertigation is used to supplement nutrients that are already present or to make up for nutrient shortages found during plant tissue analysis.Statement 1 is correct: Drip irrigation also avoids water spill- age on the field which could have promoted weed growth or in- creased soil alkalinity due to water logging.Statement 2 is incorrect: Rock phosphate is not water-solu- ble and thus not suitable for fertigation.Only water-soluble fer- tilizers are effectively used in fertigation systems.Statement 3 is correct: Accurate placement of nutrient, where the water goes the nutrient goes as well.Thus, increased nutrient absorption by plants.Statement 4 is correct: Fertigation mixes fertilizers into irri- gation water so that plants receive small, measured amounts of nutrients regularly, whic
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