Question

Irrigation requirement of 90 days duration maize variety is 50 cm. How much area can be irrigated with a flow rate of 20 litre per second for 8 hours in a day.

A 20.0 ha Correct Answer Incorrect Answer
B 16.5 ha Correct Answer Incorrect Answer
C 12 ha Correct Answer Incorrect Answer
D 10.4 h Correct Answer Incorrect Answer

Solution

Irrigation availability = 20 × 60 × 60×  8 = 576000 l = 576 mᶾ /day  Irrigation required for maize 1 ha - 50cm = 10000  × 50/100 = 5000mᶾ Duration = 90 days  576 mᶾ /day availability for 90 days = 576 × 90 = 51830 mᶾ Required for 1 ha = 5000 mᶾ Area required = 51830/5000 = 10.36 = 10.4ha 

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