(b) Calculate the frequency of watering to ensure efficient irrigation for the given crop, if Field capacity of soil = 30 % Permanent wilting point = 12 % = 15 kN/m Dry density of soil Effective depth of root zone = 750 mm Daily consumptive use of water = 10 mm %3D

(b) Calculate the frequency of watering to ensure efficient irrigation for the given crop, if Field capacity of soil = 30 % Permanent wilting point = 12 % = 15 kN/m Dry density of soil Effective depth of root zone = 750 mm Daily consumptive use of water = 10 mm %3D

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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Concept explainers

Length and Length related Variables

Length can de defined as the measurement or extent of physical quantities or objects from one terminal to another terminal. Stone age humans used finger length, step length, and so on to measure the size or displacement of an object. Nowadays, depending on how precise the measurement requires to be and the object’s size is measured, we use measuring devices for measurements like rulers and steel tape. Most people have used a ruler or tape measure to measure a particular distance or the size of an object. For more precise measurements of tiny objects, the development of measurement tools such as the Vernier caliper, which permits us to measure dimensions within 1/1000 of an inch. In the last few decades, electronic distance measuring instruments (EDMI) have been implemented that permit us to measure distances from a few feet to many miles with reasonable accuracy.

Question

(b) Calculate the frequency of watering to ensure efficient irrigation for the given crop, if
Field capacity of soil
= 30 %
Permanent wilting point
= 12 %
Dry density of soil
= 15 kN/m
Effective depth of root zone
= 750 mm
Daily consumptive use of water = 10 mm

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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
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