Q. What is the correct representation for the calculation of NIR?

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Q. Determine the Gross irrigation requirement for an irrigation system if consumptive use of crop is 200 cm in terms of depth and the rainfall excess is 30 cm. assume water application efficiency = 50% and conveyance efficiency = 90%.

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Q. An outlet irrigates an area of 40 ha. The discharge required at this outlet to meet the evapotranspiration requirement of 40 mm occurring uniformly in 40 days neglecting other field losses is _________

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Q. The moisture holding capacity of the soil in a 100-hectare farm is 20 cm/m. The root zone depth of the crop is 1.0 m and peak rate to moisture use is 5 mm/day. The field is to be irrigated when 40% of the available moisture in the root zone is depleted. Calculate the frequency of irrigation.

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Q. What is the correct formula for Gross irrigation requirement?

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Q. Which formula is extensively used for estimating seasonal water requirements?

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Q. Which method is time-consuming and expensive?

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Q. Which of the following is not an empirical method of determining consumptive use?

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Q. The evapotranspiration rate is higher in light green vegetation than in dark green vegetation.

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Q. The monthly consumptive use values for paddy are 26.69, 8.76, 14.38, 22.73, 21.29, 25.50 and 15.06 for the duration of month from June to July. What is the average daily consumptive use?

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Q. Which of the following statement is wrong about consumptive use coefficient?

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Q. What is the range of reflection coefficient for close-grained crops?

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Q. Which method is widely used in India for the computation of consumptive use?

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Q. The average value of Eₜ/Eₚ for citrus crops?

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Q. The monthly consumptive use is given by _____________

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Q. Determine the pan evaporation from the following data using the Christiansen method.

Extra-terrestrial radiation in cm = 47.3 cm
Coefficient of temperature(Cₜ) = 1.403
Coefficient for wind velocity (Cw)= 1.2
Coefficient for relative humidity (Cₕ) = 1
Coefficient for percent of possible sunshine(Cₛ) = 1.073
Coefficient of elevation(Cₑ) = 1.014

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Q. Which method involves the use of crop factor?

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Q. What are the dimensions of the standard class-A pan?

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Q. Penman’s equation for the estimation of PET has been derived by using ___________

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Q. Albedo or reflection coefficient factor is used in which method?

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