COMBINED COMPETITIVE EXAMINATION (MAIN)
FORESTRY
. Paper-I
Time 3 hours Full Marks 200
Note: Thefigures in the right-hand margin indicate full marks for the questions.

Attempt five questions in all.


Question No. 1 is compulsory.


1. Answer any ten of the following 4xlO=40

What is quarter-girth formula?


Why are herbaria and arboreta pre-requisite for dendrology?


Explain the role of fire in regeneration and seedling establishment of


Shorea robusta.

What are the selection criteria for introduction of trees for wasteland .afforestation?


Explain the relationship between CAl and MAl in a forest stand.


What are the different regeneration categories that are obseryed and recorded during Tectona grandis regeneration survey?

How do trees help in conserving soil and water?


What are the major defects found in wood?


How is remote sensing advantageous as compared to ground survey?


How is damage due to teak defoliator and stem borer managed in plantation?


Explain the factors which decide the choice of enumeration in forests.


What is the importance of estimating form factor of a tree?


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2. Differentiate between any eight of the following 5x8=40

EV,en-aged and Uneven aged forest stands


Keystone species and Indicator species


Tending and Cultural operations


Selection thinning and Crown thinning


Photosynthetic efficiency and Nutrient use efficiency··


Seedling seed orchard and, Clonal seed


National Parks and Wildlife Sanctuaries


Saline and Alkaline soils


Indian Irregular Shelter wood system and Selection system
OJ Embryo dormancy and Enforced seed donnaIlcy



3. Answer any five of the following 8x5=40

Variation in stand density induced by thinning caQses very large variation in diameter growth but remarkably little in height growth. Discuss.


Describe the techniques for eco-restoration of sand dunes and logged wastelands.


Discuss the salient features of shelter wood systems of forest management with its merits and demerits.


Explain the kind and pattern of felling in selection system of forest management.


How do variations in density and, quality of a forest influence annual yield estimation?


What is GIS? How is GPS used in ground truthing?


4. Answer any four of the following: lOx4=40
I

Describe the volume method of regulation of cut for sustained yield:


What are the sources of soil nitrogen in a forest ecosystePl? Give a brief account of nitrogen cycling in forest ecosystem.


Explain the role of trees in abetment of air, waterandnoise'ponution.


2
.

Write the practical uses of chain and compass survey in forestry.
Describe the proper orientation for ideal forest buildings.
5. Answer any two of the following: 20x2=40

Write the simple design and construction of timber bridges across river in the forest.


What are the relative merits of pure and. mixed forest stands,

direct seeding and transplanting, indigenous species and exotic species, ordinary thinning and crown thinning?


What is Integrated Pest Management Describe important components of IPM and its importance in. the management of pests. What are the methods of IPM used in nurseries and forests?


6. Answer any four of the following 10x4=40

Describe the principles of remote sensing. What is an aerial photography? How is the identification of tree species done from aerial photograph?


Explain in brief the factors that decide the choice of a silvicultural system.


Explain brief the chemical composition of acid rain and its impact on forest vegetation.


What is a working plan? Enumerate various types of maps prepared by a working plan officer.


Describe biotic influences on forest growth.


7.
Why is diameter and measurement important in forest mensuration? Explain how the height of a tree is determined by Abney's level if the tree is standing at different terrain situations. 40

8.
Briefly describe various structural components of a forest ecosystem. • Explain in detail the various structural and functional changes occurring in the plant commUnities during the course of succession. 40


l02/DD5-2015/FORST-PI/Set-B 3 [P.T.O.
9. What are the different types of forest fIre? Give the main causes of forest fire. Explain the effect of fire on soil and vegetation. Briefly explain the method of controlling forest fire. 40
10. Write an essay on the history of forests and forestry in India with special reference to wildlife conservation. 40


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