Question

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

(d) 2, 3 and 4 only

Answer 1

Correct option is (c) 1, 3 and 4 only

When an element forms precipitate with another substance commonly found in the irrigation water, it is not advisable to use this method. Phosphorus and anhydrous ammonia may form a precipitate in water with high calcium and magnesium content. So they are not used in fertigation. So 2nd statement is wrong by elimination we arrived at the answer "c".