Pamphlets on Forestry, Volume 121991 |
From inside the book
Results 1-3 of 83
Page 99
... soil which is carried off by this erosion is generally the richest and the best soil of the farms which are thus denuded . Of the rain or snow which falls on the land , a part evaporates into the air ; a second part flows down the ...
... soil which is carried off by this erosion is generally the richest and the best soil of the farms which are thus denuded . Of the rain or snow which falls on the land , a part evaporates into the air ; a second part flows down the ...
Page 284
... soil , and in this way lessens surface run - off . Again , forests , by checking the velocity of the wind and covering the mineral soil with a thick layer of dead leaves and other forest litter , effectively prevent soil transportation ...
... soil , and in this way lessens surface run - off . Again , forests , by checking the velocity of the wind and covering the mineral soil with a thick layer of dead leaves and other forest litter , effectively prevent soil transportation ...
Page 5
... soil when the leaves are shed or when the tree is cut and the brush left to decompose and make humus . Hence the improvement of the fertility of the soil by wood crops is explained , the minerals being returned in more soluble form to the ...
... soil when the leaves are shed or when the tree is cut and the brush left to decompose and make humus . Hence the improvement of the fertility of the soil by wood crops is explained , the minerals being returned in more soluble form to the ...
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