AGRICULTURE' Paper 2010
Time Allowed.' Three flours Maximum Marks: 200 I

Section"

1. Attempt any four of the following about-150 words each: 4xl0=40
Explain genetically modified crops citing one successful example in India.
What is gene? Briefly discuss the classical, modern and mo1ecular concepts of gene.
Discuss the mechanism, of fruit ripening.
What is heterosis? Briefly discuss its significance' in enhancing crop' yields.
Explain seed health testing and its importance in quality seed production.

2. Answer the following in about 150 words each:

Discuss the phenomenon of totipotency of a cell and its significance in tissue culture. 10

Briefly describe the different types of recurrent selection. Give the advantages of recurrent selection. 10

Discuss the importance of seed-certification. Briefly describe the certification process. 10

Discuss briefly the various theories on flowering in relation to photoperiodism and vernalization. 10


3. Answer the following about 150 words each:
Discuss the significance of cytoplasmic. inheritance in crop plants with examples. 10

Discuss the need for conservation and sustainable 'use of plant genetic resources. Give the methods for characterisation of germ plasm resources. 10
Discuss critically the strengths and weaknesses of public and private sectors in seed production and marketing. " 10

Discuss the importance of drought resistance and give methods for induction of drought resistance. 10.

4. Distinguish between the following in about 150 words each: 4xl0=40
Euploids and Aneuploids
Horizontal and Vertical Resistance
Auxins and Gibberellins .
Seed dormancy and viability'

Section

5. Answer the following in about 150 words each: 4xlO=40·
What is balanced diet? Discuss briefly the importance of fruits and vegetables in human nutrition.
Discuss the impact of modern agriculture on disease and insect pests scenario.
What is Bordeaux mixture? Describe method of its preparation and give its uses and 1imitations.
What are Koch's postulates of pathogenecity State their importance in plant pathology.

6. Differentiate between the following in about 150 words each: 4xl0=40
Formal and informal Gardens·
Trichogramma and Trichoderma
Green car and white car
Fruit fly and White fly

7. Answer the following in 'about 150 'words each:
What are the chronic problems production of mango? Discuss the recent technologies to overcome them 10
Discuss the procurement and distribution constraints of food grains in India. 10
Discuss the production technology for 'Gerbera' under greenhouse conditions.' 10
Give package of practices for tomato cultivation. 10

8. Write short notes on the following in about 150, words each: 4xl0=40
Bonsai culture
Biopesticides
Disease forecasting
Design and layout of a rock garden