Irrigation Engineering
If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that

reservoir was not full at the beginning
demand cannot be met by inflow
None of these
both (A) and (B)

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Irrigation Engineering
Effective precipitation for a crop may be defined as

Available water stored in soil within root zone of the crop
Total precipitation minus the loss due to infiltration
Total precipitation minus the loss due to evaporation
Total precipitation during the crop period

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