The irrigation is necessary in an area
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For irrigation purposes, the p-H value of water should be
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Super-fluous water is also called
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The moisture content of the soil, after free drainage has removed most of the gravity water, is known as
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The field capacity of a soil depends upon
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The ratio between the area of a crop irrigated and the quantity of water required during its entire period of the growth, is known as
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The whole period of cultivation from the time when irrigation water is first supplied for preparation of the ground to its last watering before harvesting, is called
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The crops require maximum water during
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The optimum depth of kot watering is 19 cm for
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Where steep land is available, the method of irrigation adopted is
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Irrigation canals are generally aligned along
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The difference in level between the top of a bank and supply level in a canal, is called
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In a canal syphon, the flow is
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For smooth entry of water in a canal, the angle between head regulator and water is generally kept
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When a canal is carried over a natural drainage, the structure provided, is known as
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For the design of major hydraulic structures on the canals, the method generally preferred to, is based on
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The main function of a diversion head works of a canal from a river, is
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The depth of rice root zone, is
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A river training work is generally required when the river is
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Water-shed line is abandoned for aligning an irrigation canal if
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Sprinklar irrigation is adopted for
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The science which deals with the physical features and conditions of water on the earth surface is called
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The earth's water circulatory system, is known as
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The process of loosing water from the leaves of plants, is termed as
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In order to estimate the high flood discharge in fan-shaped catchment, the formula used is
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Run-off is measured in
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The height of dowel above the road level should not be more than
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Water logging is caused due to
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The soil becomes, practically, infertile if its p-H value is
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A structure constructed in an irrigation canal for the purpose of wasting some of its water, is known as a
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The ratio of the head recovered to the head put in an outlet, is called
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A solid construction put across the river to raise its water level and divert the water into the canal, is known as
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Meandering of a river generally occurs, in
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Canals taken off from ice-fed perennial rivers, are known
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In a barrage, the crest level is kept
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For low navigation dams, the type of gate used is
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The bed of a canal is lowered in case of
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An outlet is said to be proportional if its flexibility, is
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For diversion of flood water of rivers, the type of canal constructed, is
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To hold hydraulic jumps, baffle walls are provided in
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