With the increase in supplied irrigation water, the yield of crops
Initially, when supply increases plants will get adequate water depth for their growth but ager certain limit water will cause water logging thus, degrading the growth of plants.
The duty of irrigation water for a given crop is maximum
Duty of irrigation canal increases as one moves from main canal to the field because losses at main canal will be higher than on field leading to lesser area irrigated for same volume of water.
Consumptive use of water for a crop represents
Crop consumptive water use is the amount of water transpired during plant growth plus what evaporates from the soil surface and foliage in the crop area. In short, evapotranspiration needs of cropped area plus the minor quantity required in plant metabolism.
Permanent wilting point moisture content for a crop represents the
Permanent wilting point is the point beyond which the roots of plant cannot access water. It is the hygroscopic water.
Useful soil moisture for plant growth is capillary water.
The efficiency of water application does not depend upon
The efficiency of water conveyance does not depend upon
The table given below the details for a particular crop, with a crop factor 0.5. The consumptive water requirement of the crop will be,
Correct Answer :- b
Explanation : Cu = kΣf
= kΣ p/40(1.8t + 32)
= 0.5[8/40(1.8*20+32) + 8/40(1.8*20+32)]
= 13.6 cm
Commonly adopted moisture tension, in atmosphere, of a soil at permanent wilting point is
At field capacity, water is held in most of the soils at a tension of
Irrigation frequency is a function of