Irrigation Engineering
Effective precipitation for a crop may be defined as

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

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Irrigation Engineering
An artesian aquifer is the one where

water surface under the ground is at atmospheric pressure
water is under pressure between two impervious strata
None of these
water table serves as upper surface of zone of saturation

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Irrigation Engineering
Which one of the following statements is correct?

All listed here
The canal system and the drainage system are complementary
The canal system runs on ridges, gets divided into smaller channels and spreads its water on the land
The drainage system runs along the lowest line, collects drainage water from the slopes and joins the main stream

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