Elements of Soil Science - Past / old Questions - 2069 Chaitra, Bachelor in Agricultural Engineering, Tribhuvan University, Nepal, Third semester,
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| Elements of Soil Science - Past Questions - 2069 Chaitra |
RIBHUVAN UNIVERSITY
INSTITUTE OF ENGINEERING
Examination Control Division
2069 Chaitra
Exam: Regular
Level: BE
Programme: B. Agri.
Year / Part: II / I
Subject: Elements of Soil Science (AE502)
Full Marks: 80
Pass Marks: 32
Time: 3 hrs.
✓ Candidates are required to give their answers in their own words as far as practicable. Attempt all questions.
✓ The figures in the margin indicate Full Marks.
✓ Assume suitable data if necessary.
What are the differences between land and soil? Describe the pedological concept of soil science. [2 + 2]
What are the soil-forming minerals? Give examples. [4]
Discuss in brief the factors of soil formation. [8]
What do you mean by weathering of rocks? Describe in brief the types of weathering. [2 + 6]
What are the differences between soil texture and soil structure? List out the significance of soil texture from an agricultural point of view. [3 + 5]
A soil sample of 100 cc weighs 165 gm. After oven drying, the weight of the sample was found to be 150 gm and the volume was measured to be 60% of the initial volume. Calculate the bulk density, particle density, and porosity of the soil. [6]
Explain the significance of soil temperature in agriculture. [4]
What is the difference between infiltration and percolation? Define field capacity and wilting point. [3 + 3]
Write a short note on the soil moisture characteristic curve. [4]
What do you mean by acidic soils, saline soils, and alkaline soils? [6]
Write down the main functions of each of the macro plant nutrients (N, P, K). [4]
Write down the deficiency symptoms of macro plant nutrients. [6]
Give two examples of inorganic fertilizers with their composition and uses. [4]
Write a short note on FYM (Farm Yard Manure) and compost. [4]
Why are green manures more preferred than inorganic fertilizers? [4]
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