Excerpt from Selected Trees and Shrubs Evaluated for Single-Row Windbreaks in the Central Great Plains States Forestry Project immediately after the Dust Bowl Days of the 1980's were 10 rows wide. About 50 percent were 5 to 7 rows wide and the remaining 10 percent were either 3, 4, 11, or 21 rows wide Such wide barriers are effective but they waste valuable cropland. Ideally, a single row of trees or shrubs that attain substantial and uniform height in a short time, retain branches to the ground and provide sufficient year-round density would use the least land and be most desirable. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.