Source: Van der Leeden et al., _The Water Encyclopedia,_ 2nd

ed., (Chelsea, Mich.:Lewis Publishers, 1990).
Defined scientifically, drought is not lack of rain. It is a dry
soil condition in which plant growth slows or stops and plant
survival may be threatened. The earth loses water when wind blows,
when sun shines, when air temperature is high, and when humidity is
low. Of all these factors, air temperature most affects soil
moisture loss.

Source: The Water Encyclopedia. Source: _The Water Encyclopedia_ facebooktwittergoogle_plusredditpinterestlinkedinmail