Irrigation Engineering
With the increase in the quantity of water supplied, the yield of most crops

decreases continuously
increases upto a certain limit and then decreases
increases upto a certain limit and then becomes constant
increases continuously

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Irrigation Engineering
A divide wall is provided

Parallel to the axis of weir and downstream of it
At right angle to the axis of weir
At an inclination to the axis of weir
Parallel to the axis of weir and upstream of it

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Irrigation Engineering
A water-logged land is found suitable for cultivation due to

Regular supply of water to plants from the water table by capillary action
Ease of tillage for preparation of the field for optimum condition of germination
Absence of aeration of soil from root zone of the plant
None of these

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Irrigation Engineering
The flow-mass curve is graphical representation of

Cumulative discharge and time
Discharge and time in chronological order
Cumulative discharge, volume and time in chronological order
Discharge and percentage probability of flow being equaled or exceeded

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