Irrigation Engineering
Effective precipitation for a crop may be defined as

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

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Irrigation Engineering
A deep well

is weaker structurally than a shallow well
both (A) and (B)
has more discharge than a shallow well
is always deeper than a shallow well

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