The moisture holding capacity of the soil in a 100 hectare farm is 18 cm/m. The field is to be irrigated when 50 percent of the available moisture in the root zone is depleted. The irrigation water is to be supplied by a pump working for 10 hours a day, and water application efficiency is 75 percent. Details of crops planned for cultivation are as follows: Peak rate of Crop X Y Root zone depth (m) 1.0 0.8 moisture use (mm/day) 5.0 4.0 The capacity of irrigation system required to irrigate crop 'X' in 36 hectares is

The moisture holding capacity of the soil in a 100 hectare farm is 18 cm/m. The field is to be irrigated when 50 percent of the available moisture in the root zone is depleted. The irrigation water is to be supplied by a pump working for 10 hours a day, and water application efficiency is 75 percent. Details of crops planned for cultivation are as follows: Peak rate of Crop X Y Root zone depth (m) 1.0 0.8 moisture use (mm/day) 5.0 4.0 The capacity of irrigation system required to irrigate crop 'X' in 36 hectares is

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Q2-1/ An agricultural farm is cultivated by crops. Available data are: dR = 1.8 (m), A = 50 (Hectare), (wv)p=15% and (wy)F = 32%. Compute volume of irrigation water required to be added to the farm in order to raise water content in porous soil of R. Z. from (wy)p% to (wy)F%. Note/ (Wy)add (Wy)F - (Wv)p ANSWER/ = (Wy)add = (Wy)F - (Wv)p = 17% (Wv)add = {(Vw)add/(Vt} x 100 (Vw)add = 153000 (m³ of irrigation water) required to be add.
Q2-2/ An agricultural farm is cultivated by crops. Available data are: dr = 1.2 (m), A = 50 (Hectare), G = 1.25, Gs=2.7 and (wy) = 21.48 %. Compute values of the followings: (wy)s% and (dw)F. (Vw)s (m³ of water stored in the soil of R.Z. at its saturated condition). ANSWER/ (Wv)s = 53.7%, (Wv)d=21.48%, (Vw)s = 322200 (m³ of water stored in the soil of R.Z. at its saturation condition). (dw)F= 0.387 (m of water depth/each irrigation process)
After how many days will you order irrigation in order to ensure healthy growth of crops, if the field capacity of soil is 29%, PWP is 11%, Density of soil is 1300 kg/m³, Effective RZ is 700 mm, daily Cu is 12 mm. For healthy growth, moisture content must not fall below 25% of the water holding capacity of soil.
Given the following soil and crop data are provided:• Area to be irrigated = 50000 m2• Soil: medium texture, loam• Crop: Millet with peak daily water use = 6.2mm/day• Soil moisture at field capacity = 30 cm/m• Soil moisture at the permanent wilting point = 15 cm/m• Allowable portion of available moisture permitted for depletion by thecrop before the next irrigation = 50%• RZD = 80 cm• Soil infiltration rate = 5.6 mm/hr• Irrigation efficiency = 75%• Operation time per day: 2 shifts per day operating at 600 minutes pershiftDetermine:Available moisture.Net depth of water application per irrigation.Irrigation frequency. Gross depth of water application.System capacity.
In a cultivated area, the soil has porosity of 45% and field capacity of 38%. For a particular crop, the root zone depth is 1.0 m, the permanent wilting point is 10% and the consumptive use is 15 mm/day. If the irrigation efficiency is 60%, what should be the frequency of irrigation such that the moisture content does not fall below 50% of the maximum available moisture? (a) 5 days (c) 9 days (b) 6 days (d) 11 days
Irrigation water is to be provided to a crop in a field to bring the moisture content of the soil from the existing 18% to the field capacity of the soil at 28%. The effective root zone of the crop is 70 cm. If the densities of the soil and water are 1.3 g/cm³ and 1.0 g/cm³ respectively, the depth of irrigation water (in mm) required for irrigating the crop is 1. 9.1 2. 8.1 3. 7.1 4. None of the above X
Solution.
Irrigation and drainage, i need solutions in 15 minutes please. MCQ/A crop has to be grown at a certain place, the climatological conditions for the month January are tabulated below. Determine the field irrigation requirement in the month January if the water application efficiency is 80%. Use Blaney-Criddle equation and a crop factor is 0.8. A-5.5 cm B-8.5 cm C-6.9 cm D-10.5 cm
d. Is it true that the lower the soil moisture tension the greater the moisture content? Why? e. Which class of soil water is most important to irrigation? How about the drainage? f. During the hot part of the day you notice some plants start to wilt. What does this indicate?
Solution.
g. how does the crop water requirement vary with stage of crop growth and season of the year?
problem (e) - In a trickle irrigation system, maximum allowable depletion is 30 percent, moisture area is 45 percent, root depth is 1.7 meters, soil water holding capacity is 96 millimeters (in root depth), water requirement is 6 millimeters, canopy is 75 percent, electrical conductivity of saturated paste extract is 8 decisiemens per meter, and electrical conductivity of irrigation water is 0.3 decisiemens per meter. Determine maximum net irrigation depth, maximum daily transpiration, maximum irrigation interval, and leaching requirement.