Elements of Soil Science - Past Questions - 2066 Bhadra

Elements of Soil Science - Past / old Questions - 2066 Bhadra, Bachelor in Agricultural Engineering, Tribhuvan University, Nepal, Third semester,

 

Elements of Soil Science - Past Questions - 2066 Bhadra

TRIBHUVAN UNIVERSITY
INSTITUTE OF ENGINEERING
Examination Control Division
2066 Bhadra

Exam: Regular/Back
Level: BE
Programme: B. Agri.
Year / Part: II / I
Subject: Elements of Soil Science
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 any five questions. All questions carry equal marks. Assume suitable data if necessary.

1. a) Define soil in relation to agricultural production. Explain the factors affecting soil formation.
   b) Write an essay on the weathering of rocks and minerals.

2. a) What is a soil profile? Describe soil master horizons.
   b) Define bulk density, particle density, and porosity. Classify soil according to texture.

3. a) Enlist different methods of soil water measurement. Write an essay on the principle of the field tensiometer.
   b) Define infiltration and infiltration rate. Describe the factors affecting soil infiltrability.

4. a) What do you mean by cation and anion exchange? Describe in detail the cation exchange capacity.
   b) Describe macro and micro nutrients. Explain the role and deficiency symptoms of phosphorus in plants.

5. a) Describe the methods of soil fertility evaluation. Discuss in detail the process of soil test method up to fertilizer recommendation.
   b) What are soil colloids? Discuss their properties.

6. Write short notes on (any four):
   a) Green manuring
   b) Soil temperature
   c) Soil moisture characteristics curve
   d) Process of soil survey and mapping
   e) Soil reaction