An increase in the closeness of the artificial grazing forest from 1.1-2.0% to 9.6% resulted in a decrease in the relative wind speed from 88% to 62%. The closeness of the natural grazing forest in 19% and 59% with mean heights of 7m and 9m, respectively, leads to the relative wind speeds of 65% and 22%, respectively. The results from modeling experiment of grazing forest in a wind tunnel indicate that if the closeness degrees of the grazing forest model are 3 %, 6 % and 25%, the relative wind speed will be...