Wind-breakers or living wind-breakers or tree cover is usually made up of perennial trees or shrubs set out into “rows”, especially on windward boundaries with the aim of protecting crops from the wind. The wind-breaker gives protection against the wind in the immediate vicinity but has influence by reducing the intensity of the wind even up to 5 times the hight of the row, provoking air turbulence and therefore a slowdown in laminar movements. The wind-breakers therefore defend crops from strong gusts of wind and reduce soil erosion since the plants are perennial. Reduction of the amount of wind drastically reduces evapotranspiration for the entire year.
In viticulture, in regions subject to strong winds, sometimes rows of upright perennial vegetation are used from green manure such as field beans in order to cushion the intensity of the wind.