Forestry
The major drawback of DDT as a pesticide is that:
Its cost of production is high
It is not rapidly degraded in nature
Organisms at once developed resistance to it
It is significantly less effective than other pesticides
It is not rapidly degraded in nature
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The light of cities is reduced in comparison to villages due to the presence of:A. SO2 and SO3
B. SO2 and oxides of nitrogen
C. Hydrocarbons and N2O
D. Suspended particulate matter
Eroded soils are:
A. Rich in plant nutrients
B. Unaltered in plant nutrients
C. Devoid of plant nutrients
D. All of these
When one population is harmed and the other remains unaffected the relationship is called:
A. Amensalism
B. Predation
C. Protoco-operation
D. Parasitism
Measurement involve in forest mensuration:
A. The determination of the dimension, form, volume, age and increments of logs, single trees, stands or whole (B.C.F.T.)
B. It is art of taking measurements for compiling data. In forestry this art is applied / used for measuring the forest produce e.g. Timber, firewood, st
C. Both (a) & (b)
D. None of these
The Tharparkar Desert is situated in:
A. Tharparkar
B. Sanghar
C. Mirpur Khas
D. All of the above
The zone of atmosphere that lies near the ground is:
A. Troposphere
B. Stratosphere
C. Homosphere
D. Heterosphere
Plants growing on burnt soil are called:
A. Heliophilous
B. Hydrophilous
C. Pyrophilous
D. Pyriform
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