Author: William N Sparhawk

Publisher: Forgotten Books

Published: 2018-03-30

Total Pages: 40

ISBN-13: 9780365706885

Excerpt from Effect of Grazing Upon Western Yellow Pine Reproduction in Central Idaho Ml From United States Department of Agriculture Bulletin 418, Western Yellow Pine In Oregon, by T. T. Unger. After seedlings are 6 inches high the damage caused by moderately close grazing is negligible. According to Table 5, western yellow pine reaches this height in 5 years on the better sites or in 8 years on the poorer sites, Douglas fir m from 10 to 12 years, and lodgepole pine in 9 years. There is practically no damage at all after seedlings reach feet in height, or after from 13 to 17 years for western yellow pine, from 16 to 20 years for Douglas fir, and 16 years for lodgepole pine. From Table 3 and the height growth it is computed that on the Deadwood allotment 46. 5 per cent of the Western yellow pine Which germinates will be killed if the area is grazed every year, or per cent if grazing is eliminated _until seedlings have passed their third year. On the South Fork the figures Will be 43. 4 per cent and 5. 7 per cent. Of Douglas fir in Deadwood, 48. 8 per cent Will be killed by grazing every year, or per cent if it is suspended for three years, on the South _fork 44. 2 per cent, or 9. 9 per cent after three years, will be lost. In Deadwood 39. 7 per cent of the lodgepole pine seedlings will be killed, or per cent if the area is grazed after the third year only.' 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.