| 1. Reduction in weed |
| 2. Reduction in soil salinity |
| 3. Reduction in soil erosion |
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
Correct Answer: C
Solution :
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, hence less 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 only 1 and 3. Ref: Environment website Gov. of Australia ;http://www.environinent.fisw.gov.au/salinity/solutions/irrigation, htm
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