SECTION B
5.
Attempt any FOUR from the following (not more
than 150 words for each):
(a)
What is plant succession? Write down the causes
of primary succession and discuss the stages of succession on new sites of
temperate Himalaya.
(b)
What are the main defects found in wood?
Describe the defects due to abnormal growth.
(c)
What is meant by encroachment in the forests?
Discuss the factors responsible for encouraging encroachment.
(d)
Discuss the importance of economic analysis in
making forestry decisions.
(e)
Discuss the legal provisions made under I.F.A.
1927 for protection against fire.
6.
(a) Describe the revised classification of
forest types of India as proposed by Champion and Seth (1968). Give two
examples for each type.
(b) Differentiate between:-
(i) Gum and Resin (ii) Tans and Dyes
(iii)
Sapwood and Heart Wood (iv) Lac and Shellac (v) Floating and Rafting.
(b)
What is shifting cultivation? Describe the
various measures for control of this practice.
7.
(a) What are the causes of forest fire? Discuss
in brief the damages caused to forest by fire.
(b) “Plants are amongst the most important
sources of medicines and drugs” – Discuss with suitable examples.
(c) What do you understand by demand?
Discuss the various factors influencing the demand of forest products.
8. (A) what is meant by “Preservation of
timber”? Why is it done? Describe in brief the different wood preservation
techniques.
(b) What are the sources of soil nitrogen
in forest ecosystems? Give an account of nitrogen cycling in forest ecosystems.
(c) Discuss the basic objectives of National
Forest Policy 1988.
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