Forestry

Wind breaks

Soil binders

Shelter belts

Basin blisters

Soil

Water

Noise

Air

Lithophytes

Xerophytes

Hydrophytes

Mesophyte

Global warming

Acid rain

Greenhouse effect

The UV radiations reach the earth

Tansley

Warming

Carl Mobius

S.C.Pandya

Allomones

Allelochemics

Kairomones

Depresants

Flosses, medicinal plants,

Gums, essential oils rosin and turpentine tannins

Silk and lack production

All of the above

Lichens-mosses-annual herbs-wood shrubs

Annual herb-weedy shrubs-lichens-mosses

Woody shrubs-mosses-lichens-annual herbs

Mosses-annual herbs-woody shrubs-lichens

Course textured soil (more sand particles)

Medium textured soil (qual proportion of very fine sand, silt and clay)

Fine textured soil (silt and clay)

All of the above

One

Less than one

More than one

Any of these