Indian Forest Service Examination-20r 2

AGRICULTURE
Paper II
Time Allowed: Three Hours I Maximum Marks 200 I
INS.TRUCTIONS
Candidates should attempt questions. I and 5 which are compulsory and any THREE of the remaining questions selecting at least ONE • question from each Section. Marks carried by each part of a question. are ·indicated against each. Answers must be written in ENGLISH only. Neat sketches may be drawn, wherever required. Important Note All parts /sub-parts of a question must be attempted contiguously. That is, candidates must finish attempting all the parts I sub-parts of each question they are answering in tile ans_wer-book before moving on to tile next question. Pages left blank must be clearly strock out. Answers that follow any pages left blank may not be given credit.

Section- A
1. Attempt the following in about 150 words each
4xl0=40
Explain the differences between agrobacterium mediated gene transfer and 'gene gun' methods. Give example of crop where both methods have been used.
Give characteristics of 'caulimovirus' group along with suitable examples.
Explain the factors responsible for retarding the fruit ripening.
How ions effect the activity of enzymes

2. Answer the following in about 150 words each :4xl0-40
How fruits and vegetables help in adding nutritive value to human food
What are the requirements of seed certification for production of quality seed
Explain the modern practices to Identify promising inbred lines for production of commercial hybrids.
Explain the concepts of economic threshold and economic injury level in integrated pest management.

3. Answer the following in about 150 words each :4xl0=40
Briefly discuss the points which must be considered while selecting for isolation of land in rice seed production.
Explain the advantages of marker assisted breeding over conventional plant breeding. Also give differences in their methodologies.
Explain wilting coefficient and physiological dryness in crop plants.
Describe the significance of inoculative releases and augmentation of natural enemies.··

4. Distinguish between the following in about 150 words each •
Scarification and stratification
Conjugation mapping and recombination mapping·
Fruit fly and white fly
Deflocculating agents and emulsifying agents

Section- B

5. Answer the following in· about 150 words each :4xl0=40

Why planting system is important for the orchard operations Explain Quincunx system.
What is integrated disease management? Give management of early and late blight of potato.
Explain the genetic consequences of different modes of reproduction and their relevance in plant breeding.
Explain the effect of water stress on leaf expansion and rate of photosynthesis.

6. Differentiate between the following in about 150
words each 4x 10=40
Oxidative phosphorylation and photophosphorylation
Baculovirus and entomopathogenic bacteria
Surface feeder and germ feeder
Neonicotinoids and triazines ··

7. Write short notes on the following, with specific examples, in about 150 words each 4x I 0=40
Testing, release and notification of cropvarieties
Vertifolia effect
Distant hybridization in crop improvement .
Conservation of plant genetic resources

8. Attempt the following in about 150 words each :4x10=40
Describe the cowpea production technology with reference to varieties, sowing time, seed rate, manuring and fertilization and plant protection methods.
What are the major constraints of pulse production in India
Describe opportunities and challenges in food processing industry in the country.
Enumerate the differences between Japanese and Mughal gardens.