Irrigation Engineering
The intensity of irrigation means

Percentage of 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
Percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually

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Irrigation Engineering
Which one of the following statements is correct?

The canal system and the drainage system are complementary
All listed here
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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