Source: The Water Encyclopedia.

The kind of vegetation growing on a particular plot and its density
have even more to do with soil moisture loss than temperature or
humidity or wind speed. And, surprising as it might seem, bare soil
may not lose much moisture at all. I now know it is next to
impossible to anticipate moisture loss from soil without first
specifying the vegetation there. Evaporation from a large body of
water, however, is mainly determined by weather, so reservoir
evaporation measurements serve as a rough gauge of anticipated soil
moisture loss.

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