Question

Which of the following is/are the advantage /advantages of practising drip irrigation?
1. Reduction in weed
2. Reduction in soil salinity
3. Reduction in soil erosion
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) None of the above is an advantage of practising drip irrigation

Answer 1

(c) (i) Advantages of Drip Irrigation:
(a) Maximum use of available water.
(b) No water being available to weeds.
(c) Maximum crop yield.
(d) High efficiency in the use of fertilizers.
(e) Less weed growth and restricts population of potential hosts.
(f) No soil erosion.
(ii) Drip irrigation wets less ground, henceless weed seeds germinate. And over-irrigation of crops by using techniques such as drip irrigation can increase the soil salinity. Thus by elimination method, we get answer (c) only 1 and 3.
Ref: Environment website Gov. of Australia;