To Establish the Sand Drift: Most dunes are born of small accumulation of sand or debris. Blocked by this insignificant obstruction, the ocean winds that cross the beach lose much of their force and drop any sand they have picked up. A little mound forms, enlarges into a hillock and eventually into a dune. Some dunes grow to a height [...]
Arid zones are not uniform. There are at least four primary groups: 1. Hot, dry global zones bounding both sides of the tropics, as in North Africa and the middle East. 2. Cold, continental dry zones, as in central Asia and central Australia. 3 Cold, upland dry zones, blocked by high mountains, such as in central Anatolia. 4. Cold and [...]
Medicinal plants in hot Indian arid zone enjoy considerable reputation as drugs and are used in different systems of medicine either as the active principle or crude systems of medicine either as the active principle ingredient or crude drug. The resources of the Indian arid zone are very limited. There is a considerable pressure on the land and natural vegetation. [...]