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 evaporation
Total precipitation during the crop period
Total precipitation minus the loss due to infiltration

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Irrigation Engineering
A deep well

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

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Irrigation Engineering
The intensity of irrigation means

Percentage of gross commanded area to be irrigated annually
Percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually
Total depth of water supplied by the number of waterings
Percentage of culturable commanded area to be irrigated annually

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