Forestry

Phosphene

Nitrogen

Hydrogen

Nerve gas VX

Acidity

Metal toxicity

Aridity

Salinity

Which thorny usually hard wooded species predominate, Acacia spp. Being particularly characteristic

The trees usually have short boles and low branching crowns which rarely meet except on exceptionally favourable spots

Both (a) & (b)

None of these

Influence of soil and moistue conditions

Influenceof climate

Succession

All of the above

Pakistan’s mainstay is agriculture, which is dependent on canal irrigation. Sound management of watersheds should, therefore, constitute the basic obj

Because of inadequate forest resources Pakistan must concentrate on developing new plantations.

The country is heavily populated and faces an energy crisis. Since there is little scope to increase the area of state forests, agro-forestry programm

Both (a) & (b)

Producers and consumers

Producers and decomposers

Producers, consumers and decomposers

Producers and light

Environmental resistance

Biotic potential

Imigration

All of these

Air spaces

Cuticle

Well developed sclerenchyma

Well developed vascular tissues

Forests are managed intensively and the pilot projects started in Kaghan valley in Hazara and Kalam valley in Malakand Civil Divisions are replicated

Extraction from coniferous forests is limited to public sector only. Timber harvesting has already been departmentalized in four provinces and Azad Ka

The jurisdictional charges of forest personnel are rationalized to make them more manageable

All of the above

Erosion and trampling by animals

Poor agricultural practices and excessive water

Over-grazing and extensive ploughing

Erosion, poor agricultural practices and over grazing