Advantages of Fertigation

Fertigation is the injection of fertilizers into an irrigation system. It allows precise control of water pH and alkalinity using acid solutions (Statement 1 is correct). However, for fertigation to work, the fertilizers must be completely water-soluble. Rock Phosphate is highly insoluble in water and will clog the drip emitters; hence, it cannot be efficiently applied via fertigation (Statement 2 is incorrect). Because nutrients are delivered directly to the root zone in controlled liquid doses, plant uptake is highly efficient (Statement 3 is correct) and the deep percolation or leaching of excess chemicals into groundwater is severely minimized (Statement 4 is correct). > One-line conceptual takeaway: Fertigation delivers immense precision in nutrient dosing and water pH control, but strictly requires 100% water-soluble fertilizers. Answer: (c).