Question

It is said that a particular type of crop requires a depth of 6 cm of water every 24 days and the crop period is 168 days. Find the delta of the crop?

(a) 50 cm

(b) 42 cm

(c) 20 cm

(d) 95 cm

I had been asked this question in exam.

The question is from Water Requirements in section Water Requirements of Crops of Irrigation Engineering

Answer 1

The correct option is (b) 42 cm

For explanation I would say: Assume that crop period is equal to base period. So, given base period is 168 days, and it requires watering for every 24 days. Therefore number of waterings for entire cultivation = (168/24) = 7

Each watering needs 6 cm depth of water. So, therefore total depth of water required in 168 days = 7 x 6 = 42 cm.