Forestry

1H

2H

3H

4H

Irregular Shelterwood system

Coppice system

Both (a) & (b)

None of these

An agroforestry and social forestry approach to land use exists in areas

Where soil fertility is low and mainly depends on the soil organic matter fraction

Where erosion potential is high and where the incidence of surface soil desiccation is high

All of the above

Clements

Kormondy

Warming

Elton

Primary producer

Consumer

Primary producer and consumer

None of the above

Many parts of the world, but primarily in tropical rain forests

They live in highly organized colonies to a strict caste system

The nests are built to provide central heating and air-conditioning

All of the above

Man and biology programme

Man and biosphere programme

Mammals and biosphere programme

Mammals and biology programme

Chlorides

Cyanides

Fluorides

Nitrates

About 1%

0.35%

0.90%

3%

Phypsiograpphic features of the country, conservation of soil and water, regulation of stream flow

And prevention of such calamities as floods, land sides, siltation of dams and change in the course of rivers

Both (a) & (b)

None of these