What is a module or outlet called whose discharge is fixed and limited regardless of fluctuations in water levels in the distributary?
Correct answer A. Modular
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Agriculture MCQs
Page 37 of Agriculture multiple-choice questions with answers. Tap an option to check yourself.
Page 37 of 135
What area do Aridisols, the most extensive soils in Pakistan, cover?
Correct answer C. 259,710 km2
Besides Bligh’s creep theory, which engineer’s theory is used to determine the total length of the impervious floor of a hydraulic structure?
Correct answer D. Khosla
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What are soil pores made by animals such as earthworms and by plant roots called?
Correct answer C. Biopores
An inverted filter consists of layers of material with increasing what from bottom to top?
Correct answer C. Permeability
Which of the following crops is most tolerant of salty soils?
Correct answer A. Cotton
An inverted filter is placed just after the end of a concrete floor. Which risks does it reduce?
Correct answer D. A and B are correct
Who are the father of soil conservation and the father of pedology respectively?
Correct answer C. Bennett & Dokuchaev
What is Khosla’s seepage theory for the design of hydraulic structures called?
Correct answer D. Method of independent variables
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Strong soil acidity causes toxicity of which element?
Correct answer B. Al
According to Khosla, in which direction does undermining caused by seeping water progress?
Correct answer D. Downstream to upstream
How is a silica tetrahedron arranged?
Correct answer C. Four sided arrangement
To keep a hydraulic structure safe against undermining, which quantity must be kept within safe limits?
Correct answer A. Exit gradient
By what is nitrogen fixation accomplished?
Correct answer A. Bacteria from atmosphere
Which clay mineral has the highest cation exchange capacity?
Correct answer B. Vermiculite
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Head loss H/L is proportional to creep length. What is the loss of head per unit creep length called?
Correct answer C. Hydraulic gradient
According to Bligh, what is the length travelled by percolating water as it seeps along the base contour of a hydraulic structure called?
Correct answer B. Creep length
From which language is the word ‘soil’ derived?
Correct answer C. Latin
A hydraulic jump forms downstream of the toe of a glacis to dissipate surplus energy. Which number governs the nature and strength of the jump?
Correct answer A. Froude number
In which type of rock are fossils found?
Correct answer D. Both A and C