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Which of the following is the correct formula for Gross irrigation requirement?

Which of the following is the correct formula for Gross irrigation requirement? Correct Answer FIR/Nc

It is defined as the amount of water required to meet the field irrigation requirements plus the amount of irrigation water lost in conveyance through the canal system by evaporation and seepage. Mathematically, GIR = FIR/Nc.

Related Questions

If one plots the tank irrigation in India and superimposes it with map of well irrigation, one may find that the two are negatively related. Which of the following statements explain the phenomenon? 1. Tank irrigation predates well irrigation. 2. Tank irrigation is in the areas with impervious surface layers. 3. Well irrigation requires sufficient groundwater reserves. 4. Other forms of irrigation are not available. Select the correct answer using the code given below.
If one plots the tank irrigation in India and superimposes it with map of well irrigation,one may find that the two are negatively related. Which of the following statements explain the phenomenon?1. Tank irrigation predates well irrigation.2. Tank irrigation is in the areas with impervioussurface layers.3. Well irrigation requires sufficientground water reserves.4. Other forms of irrigation are not available.Select the correct answer using the code given below.
1996-7 and 2002-3, the area under canal irrigation declined by 2.4 million ha (13.8 percent), the area under tank irrigation fell by 1.4 million ha (42.4 percent), and the area irrigate by all other sources declined by 1 million ha (28 percent). The only irrigation source that increased its share was groundwater wells, by 2.8 million ha (more than 9 percent) Why has such a change in irrigation demands happened? 1. Not enough supply of water from canals 2. More tubewell irrigation by farmers in the source areas of rivers 3. High cost of irrigation water, and  diversion for non-farm use 4. Joint use of water not possible due to social and economic inequalities
Which of the following statements are correct? (a) Low head bubbler irrigation is a modified method of sprinkler irrigation. (b) Micro spray irrigation is a modified method of sprinkler irrigation. (c) Water application efficiency is usually higher in clayey soils than sandy soils. (d) In sprinkler irrigation system water is applied at lower rates than soils in filterability to prevent ponding and surface run off.
Depending upon the source from which the water is drawn, flow irrigation can be sub-divided into 1.River canal irrigation 2. Reservoir or tank irrigation 3. Combined storage and lift irrigation 4. Combined storage and diversion irrigation Which of the above designations are relevant?
Consider the following statements regarding irrigation: Drip irrigation system, also known as the 'trickle irrigation system' where water is applied on the soil surface at a rate lower than the infiltration rate of the soil. Sprinkler irrigation is not suitable if a site is known to be windy most of the time. Which among the following above given statements are correct?
Consider the following statements about Irrigation in U.P. region: 1. Moradabad, Rampur, Badaun, Hathras, Firozabad, Farrukhabad, Kannauj, Kheri Shrawasti, S. K. Nagar, Gorakhpur, Ambedkar Nagar and Mau in them irrigation was provided above 50 per cent with the help of tube wells. 2. Irrigation by other sources is provided in crop cultivation where canals and tube-wells do not constitute as the source of irrigation. Select the correct answer using the code given below:
Which of the following statement is/are incorrect about Canal Irrigation? Canal irrigation provides safety from droughts and it brings fertile sediments to the fields. The main concentration of canal irrigation is in the southern plains. The percentage of canal irrigation area to total irrigated area in the country has fallen from about 40% in 1950-51 to less than 25% at present. Select the incorrect code from below.
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%.
What is the correct formula for Gross irrigation requirement?