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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Irrigation Engineering
A deep well

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

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Irrigation Engineering
A counter berm is

A vertical benching provided on the inner edge of the bank
A horizontal benching provided on the outside slope
A horizontal benching provided on the inside slope
A vertical benching provided on the outer edge of the bank

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