BOTANY

Detailed explanation-1: -To achieve the mini-mum level of this density range, plant at least three rows of trees and shrubs with at least one row being a conifer. Extend the windbreak a minimum of 100 feet past structures needing protection to accommodate wind turbulence at the end of the windbreak and end-drifts of snow.

Detailed explanation-2: -A good windbreak should provide protection to a distance approximately 8-10 times its height. Most evergreen trees-which grow 40 to 80 feet-serve nicely to give the windbreak this necessary height.

Detailed explanation-3: -The length of a windbreak determines the total area receiving protection. For best protection the length of a windbreak should exceed the height by at least 10 to 1.

Detailed explanation-4: -Windbreaks are barriers used to reduce and redirect wind. They usually consist of trees and shrubs but also may be perennial or annual crops and grasses, fences, or other materials. The reduction in wind speed behind a windbreak modifies the environmental conditions or microclimate in this sheltered zone.

Detailed explanation-5: -Important factors related to efficiency of windbreaks are height, length, vegetation density, number of rows, continuity, orientation, and species composition.