Irrigation Engineering
Effective precipitation for a crop may be defined as

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
Total precipitation minus the loss due to evaporation

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Irrigation Engineering
A counter berm is

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

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