How many soil-forming factors control the kind, rate and intensity of pedogenic processes?
Correct answer D. None of the above
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Agriculture MCQs
Page 28 of Agriculture multiple-choice questions with answers. Tap an option to check yourself.
Page 28 of 135
Pakistan is predominantly a dryland country, with 80% of its land arid or semi-arid, 12% sub-humid and 8% humid, so its soils are vulnerable to many degradation processes. As in south-central Asia and sub-Saharan Africa, which of these are major causes of soil degradation and desertification?
Correct answer D. All of the above
The major soil fertility problems in Pakistani soils are deficiencies of N, P and Zn; K, Fe and B deficiencies occur in particular crops or soils, while S, Cu and Mn deficiencies are negligible. Which nutrients, along with some micronutrients such as Mo, are commonly deficient?
Correct answer C. Both A & B
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Which diagnostic techniques are used to assess soil nutrient status and decide crop fertiliser requirements?
Correct answer D. All of the above
From a crop production point of view, what does soil testing refer to?
Correct answer D. Both A & C
Which agents transport rocks and weathered material that act as parent material for soil formation?
Correct answer D. All of the above
Physical, chemical and biological weathering ____ rocks and minerals into simpler products that accumulate in place or are carried elsewhere to become soil parent material. Which word fills the gap?
Correct answer D. Both a & c
The soil ‘A’ horizon is also designated as which of these?
Correct answer D. None of the above.
What kind of rock is basalt?
Correct answer C. Both A & B
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What are sediments called that consist of particles formed by the breakdown of pre-existing rocks through weathering?
Correct answer A. Clastics
Which of the following igneous rocks occur over considerable areas of Pakistan?
Correct answer D. None of the above
What is the maximum amount of water a soil can hold after free drainage has stopped called?
Correct answer B. Water holding capacity
In cation exchange, 18 mg of ammonium ion can be exchanged for which of these?
Correct answer C. 12 mg of Mg
One hectare-centimetre of water is equal to how much?
Correct answer C. Both A and B
Which is the most outstanding green manure crop?
Correct answer A. Dhaincha
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In which country is the journal ‘Plant and Soil’ published?
Correct answer A. The Netherlands
Which of the following phosphatic fertilisers are water-soluble?
Correct answer D. All of these
What is 1 bar equal to?
Correct answer D. All of these
Which soil order, common in the tropics, is highly weathered and dominated by iron and aluminium oxide clays?
Correct answer A. Oxisols
Which indicator is used to estimate available boron in soil?
Correct answer A. Azomethine-H