IFS Forestry 2001
Paper-I

Section A
1. Answer any four of the following:
a. Variations in stand density, such as induced by thinning, cause very large variations in diameter growth but remarkably little in height growth. Discuss
b. Discuss the relative merits of direct seeding and planting
c. Describe the ‘volume method of regulation’ of cut for sustained yield
d. Describe the different variations of shelter wood method of regeneration of even-aged stands
e. Discuss the relative merits of pure and mixed stands
2. Answer the following questions
a. Discuss the problems of stand establishment in cold areas
b. Describe the method of periods and periodic blocks for regeneration
3. Answer the following questions
a. Discuss the environmental effects of clear-cutting and harvesting
b. Describe the various objectives of formulating a silvicultural system for a stand
4. Describe the silviculture of the following species in details:
a. Poplars
b. Bamboos
c. Prosopic juliflora
d. Cedrus deodara

Section B
1. Answer any four of the following:
a. Discuss the impact of fire on forest regeneration
b. Describe the chemical composition of acid rain and its impact on forest vegetation
c. Describe the general guidelines for the selection of plus trees from even-aged stands
d. Write a note on integration of livestock in agro forestry practices
e. Discuss the importance NTFPs in the life of tribals
2. Answer the following questions
a. Describe the different types of damage caused by wind erosion of soil
b. How can forest trees be deployed for checking soil erosion by wind
c. Write a note on rehabilitation of degraded areas through forestry
3. Answer the following questions
a. How do agro-forestry practices lead to increase in soil fertility
b. Briefly describe the main agro forestry systems
4. Answer the following questions
a. Describe the types, sequence and time scale of species trials. Give object and features of each phase
b. Give a detailed account of selection and management of seed stands in conifers