Download PTU B.Sc-Agriculture 2020 March 7th Sem 74828 Soil Physical And Biological Environment Question Paper

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Roll No. Total No. of Pages : 02

Total No. of Questions : 09

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B.Sc. Agriculture (2014 to 2018) (Sem.-7)

SOIL PHYSICAL AND BIOLOGICAL ENVIRONMENT

Subject Code : BSAG-CS701

M.Code : 74828

Time : 3 Hrs. Max. Marks : 60

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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Q1. Write short notes on the following :

1. Soil Tilth
2. Soil organism
3. Bulk density
4. Percolation

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5. Drainage
6. Leaching
7. Infiltration
8. Movement of water in pores
9. Eluviation

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10. C:N ratio

SECTION-B

Q2. Discuss in detail the soil thermal regimes of humid and arid regions.

Q3. Enlist factors of soil formation and discuss role on any one in detail.

Q4. Explain different processes which affect soil temperature.

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Q5. Explain management techniques to check soil erosion.

Q6. Discuss infiltration and redistribution of water in soil.

SECTION-C

Q7. a) Explain in detail the factors which affect composition of soil-air.

b) Explain Darcy’s law in relation to movement of water in soil under saturated conditions.

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Q8. Derive mathematically Darcy’s law showing movement of water under submerged conditions.

Q9. a) Elaborate the role of soil organism in maintenance of ecological balance.

b) Explain activities of soil micro-organism in development of soil.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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