Drylands are defined by their scarcity of water. They are zones where precipitation is counterbalanced by evaporation from surfaces and transpiration by plants (evapotranspiration). UNEP defines drylands as tropical and temperate areas with an aridity index of less than 0.65. The drylands can be further classified into four sub-types: dry sub-humi...
Found on
http://en.wikipedia.org/wiki/Drylands
A general term for semiarid and desert lands.
Found on
https://www.encyclo.co.uk/local/22327
No exact match found.
