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 :
A
1, 2 and 3 only
B
1, 2 and 4 only
C
1, 3 and 4 only
Correct answer
D
2, 3 and 4 only
Explanation
Fertigation allows for precise nutrient delivery directly to the root zone, which increases nutrient availability (3), reduces leaching (4), and enables pH adjustment to control water alkalinity (1). Statement 2 is incorrect because Rock Phosphate is insoluble in water and unsuitable for fertigation, as it would clog irrigation emitters. The core concept tested is the technical application and solubility requirements of micro-irrigation-based nutrient delivery systems.
Sustainable AgricultureFertigationFertigationAlkalinityIrrigation waterRock PhosphatePhosphatic fertilizersNutrient availabilityLeaching