Q11) For a particular irrigated farm with a clay loam soil of R.Z = 1.25m, the water holding capacity of the soil is 20 cm/m depth of soil. The last irrigation date was January 31. Determine the next date of irrigation process, if evapotraspiration (ET) is 8mm/day, the effective rainfall (ET) is 12 mm at February 6; the readily available moisture (RAM) is 55% of the available water. *

Q11) For a particular irrigated farm with a clay loam soil of R.Z = 1.25m, the water holding capacity of the soil is 20 cm/m depth of soil. The last irrigation date was January 31. Determine the next date of irrigation process, if evapotraspiration (ET) is 8mm/day, the effective rainfall (ET) is 12 mm at February 6; the readily available moisture (RAM) is 55% of the available water. *

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Q11) For a particular irrigated farm with a clay loam soil of R.Z = 1.25m, the water holding capacity of the soil is 20 cm/m depth of soil. The last irrigation date was January 31. Determine the next date of irrigation process, if evapotraspiration (ET) is 8mm/day, the effective rainfall (ET) is 12 mm at February 6; the readily available moisture (RAM) is 55% of the available water. * March 01 None of the above Jan., 14 Feb., 19
i. Assume that readily available moisture amounts to 150 mm/meter depth of soil profile. If consumptive use rate is 5mm/day what is the irrigation interval for a crop with 30 cm root zone.
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Q4// Field is irrigated by border system with the following data: 1. Length of border=150m, width of border-6m , flow rate of one border =900 Lpm. 2. Application efficiency 60% , crop consumptive use 12 mm/day. 3. Infiltration formula dem = 0.6 t5 Assume the net irigation depth equal to the infiltrated depth through application time and calculate: a) Application time b) Net irrigation depth c) Gross irrigation depth d) Imigation interval min
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12) A soil with moisture holding capacity of 140 mm/m depth of available moisture profile. The root zone is 0.3 m and PAD= 35%. The daily water consumption is 5 mm/day. The irrigated area is 0.6 km2 and water can be supplied at 0.028 m3/sec. The irrigation application efficiency is 40%. Determine the frequency of irrigation. * O a) 2.94 days d) Otherwise O b) 4 days O c) 7 days