Pamphlets on Forestry, Volume 121991 |
From inside the book
Results 1-3 of 69
Page 67
... usually call " running the fire to a peak . " Generally in coniferous forests this is accomplished by cutting rights of way and digging trenches ahead of the fire , and oftentimes back - firing from the trenches . The trenches are ...
... usually call " running the fire to a peak . " Generally in coniferous forests this is accomplished by cutting rights of way and digging trenches ahead of the fire , and oftentimes back - firing from the trenches . The trenches are ...
Page 16
... usually rated at a service of 20 years ; but their depreciation during the first 10 years is at a much slower rate than during the second decade . This is on account of the market for second - hand rails which have been used but a few ...
... usually rated at a service of 20 years ; but their depreciation during the first 10 years is at a much slower rate than during the second decade . This is on account of the market for second - hand rails which have been used but a few ...
Page 8
... Usually , but not always , trails following main valleys and streams will be classed as A ; and those following ridges or tributary streams will be classed under B or C. Class A trails may or may not be convertible into wagon roads ...
... Usually , but not always , trails following main valleys and streams will be classed as A ; and those following ridges or tributary streams will be classed under B or C. Class A trails may or may not be convertible into wagon roads ...
Contents
Object of the publication | 9 |
Description of the different lines of investigationContinued | 12 |
Wood distillation | 25 |
78 other sections not shown
Common terms and phrases
acres amount annual appraisals average bark brush burning capital cent cooperation cost cover creosote crop Department of Agriculture depreciation determine diameter district Division of Forestry Douglas fir effect Engelmann spruce equipment Experiment Station farm farmers fibers fixed investments forage forest land forest reserves Forest Service Fort Bayard furnish germination grade grazing ground growth important improvements inches investigations investment loblolly pine lodgepole pine longleaf pine lookout lumber material ment methods miles mill moisture mountain National Forests operation owners patrol piling plantations planting poles practical present profit protection railroad range rangers red spruce region reproduction season secure seedlings sheep silvicultural slope soil sowing spark arresters species spring spruce streams studies stumpage sugar pine supply Telephone Company thousand feet timber tion trail trees warden white fir white pine wood lot yellow pine