LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.
FIFTH SEMESTER – APRIL 2012
PB 5409 – PRINCIPLES OF AGRICULTURE
Date : 27-04-2012 Dept. No. Max. : 100 Marks
Time : 1:00 – 4:00
Part A
Answer all the following, each within 50 words: (10 x 2 =20 marks)
- Define Agriculture?
- Enumerate the climatic factors involved in crop growth.
- What is water-logged soil?
- Write any two water use efficiencies in relation to crop production.
- Define organic farming.
- What is the role of nitrogen fertilizers?
- Mention any four implements and their uses.
- Distinguish between inter cropping and inter planting.
- What do you meant by agricultural extension programme?
- Define Botanical pesticides. Give two examples.
PART B
Answer the following, each answer within 500 words. Draw diagrams wherever necessary:
(5 x7 = 35 marks)
- a) Discuss the role of Agriculture in India
(or)
- b) Highlight the impacts of changing environment in crop production.
- a) Give a brief account on the criteria’s for scheduling irrigations in crop production.
(or)
- b) Distinguish between Drip and Sprinkler irrigation.
13.a) Write notes on chemical and biological properties of soil.
(or)
- b) Explain the role of soil nutrients in Agriculture.
14 a). Describe the methodology of seed bed preparation.
(or)
b). Explain the agronomic practices followed in sugarcane cultivation.
15 a). What is a weed? Mention its characteristic features.
(or)
b). Explain the importance of integrated pest management.
Part C
Answer any three of the following, each answer within 1200 words. Draw diagrams wherever necessary: (3x 15 =45 marks)
- Explain the modern methods of crop cultivation.
- Discuss the effect of industrial effluents on soil and water.
- Classify the Indian soils and discuss their role in maintaining soil productivity.
- Write notes on: a. intercultivation b. crop rotation c. mixed cropping
- Give an account on various control measures to protect crops from pest.
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