Forestry

Pakistan were summer temperature go as high as 45

The trees planted on farm and marginal lands and along the roads, canals and railway tracks play a very import role in reducing the suffering of peopl

Both (a) & (b)

None of these

To distribute felling and regeneration operations so as to suit local conditions of administration and markets

Suitable distribution of age classes yeld as calculated separately for each series

Both (a) & (b)

None of these

O2

O3

SO2

N2

Electrons are bombarded

Plants are grown in controlled environment

Mutations are produced plants

True breeding plants are produced

A dense accumulation of only partially decomposed plant materials which has formed in wetlands over a period of thousand of years

It collects in still water which does not have enough oxygen to complete the total process of decay

Both (a) & (b)

None of these

Soil nutrients become very dilute

Root respiration stops

Nutrients leach down due to excessive water

Cell sap in plant becomes too dilute

Always an unfavourble alteration

Always a favourable change

Rarely a favoruable alteration

Usually an unfavourable change

Live knots: v Tissues are continuous stem tissues. These are called “Tight-knots”.

Dead knots: When branch wood tissues are dead and not in continuation with main stem tissues

Both (a) & (b)

None of these

3275m(10.750 ft)

3560m

4050m

None of these

More soil

Drugs

Chemical fertilizers

Cattle dung