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Author : John H. Ohman
Publisher : Unknown
Page : 4 pages
File Size : 42,8 Mb
Release : 1968
Category : Sugar maple
ISBN : IND:30000091992978
Author : Anonim
Publisher : Unknown
Page : 16 pages
File Size : 41,8 Mb
Release : 1997
Category : Logging
ISBN : MINN:31951D02986055H
Author : Russell S. Walters,Alex L. Shigo
Publisher : Unknown
Page : 16 pages
File Size : 50,7 Mb
Release : 1978
Category : Maple sugar
ISBN : MINN:31951D029747733
Author : Alex L. Shigo,Edwin van Horn Larson
Publisher : Unknown
Page : 112 pages
File Size : 46,7 Mb
Release : 1969
Category : Hardwoods
ISBN : UIUC:30112104073389
S2This guide has been prepared to help you estimate the extent and severity of discoloration and decay in northern hardwood trees. Though this certainly is not the last word on the subject, our research in this has progressed to the point where our findings, combined with the findings of others, can be put to practical use. By dissecting living trees and studying the organisms that infect them, we now know that discoloration and decay develop in certain definite patterns. And the patterns of discoloration and decay within the tree can be predicted from external signs. Discoloration and decay are the most serious defects of northern hardwood trees. In speaking of defect, we must distinguish between injury and damage. Injury harms the tree: damage lowers the quality of the wood. For example, a disease like vascular wilt may kill the tree but do no damage to the wood. But an insect like the cambium miner may do very little harm to the tree yet do great damage to the wood. The unseen damage done to a tree is important in the economics of forestry. Every operation in growing a tree, harvesting it, and converting it into products costs time and money. And after all the time and money have been spent on a tree, the product made from it may prove to be not worth the effort; and the tree might have been used more profitably for some other product that does not require high-quality wood. The increased use of veneer offers an illustration. A veneer log brings top prices. But its actual value may not become apparent till it is put on a lathe and peeled. A log that looks very good and sound to the core, may have minute streaks of discoloration scattered all through it, so that all the veneer it produces is badly streaked with defects. On the other hand, a log that has a rotten core surrounded by clear wood may produce the highest quality of veneer. So it is not so important how much discoloration and decay a tree has, but when these defects are in a tree. The pattern of the discoloration and decay- that's the important thing.S3.
Author : Alex L. Shigo
Publisher : Unknown
Page : 48 pages
File Size : 54,6 Mb
Release : 1966
Category : Hardwoods
ISBN : MINN:31951D029869599
S2The purposes of this paper are to report and discuss results of studies on decay and discoloration in northern hardwoods following logging wounds.S3.
Author : Anonim
Publisher : Unknown
Page : 120 pages
File Size : 44,5 Mb
Release : 1982
Category : Maple syrup
ISBN : UCLA:31158011365318
Author : Alex L. Shigo,Alex Shigo
Publisher : Unknown
Page : 16 pages
File Size : 52,6 Mb
Release : 1974
Category : Trees
ISBN : MINN:31951D02964368I
Author : Curtis May
Publisher : Unknown
Page : 24 pages
File Size : 50,8 Mb
Release : 1961
Category : Maple
ISBN : UIUC:30112019252177
Author : Gene A. Hesterberg
Publisher : Unknown
Page : 64 pages
File Size : 40,9 Mb
Release : 1957
Category : Sugar maple
ISBN : MINN:31951D030053377
Author : Anonim
Publisher : Unknown
Page : 388 pages
File Size : 53,8 Mb
Release : 1966
Category : Forest insects
ISBN : CORNELL:31924061344804
Author : Anonim
Publisher : Unknown
Page : 896 pages
File Size : 49,8 Mb
Release : 1990
Category : Agriculture
ISBN : MINN:31951D02881496J
Set includes revised editions of some issues.
Author : Albina Frances Musil,Curtis May,Elbert Luther Little,Frederick Marion Lege,Gertrude Alsager Gronbech,Marguerite C. Burk,Robert L. Dickens,Robert M. Conlogue,Ruth Olive Ericson
Publisher : Unknown
Page : 820 pages
File Size : 51,9 Mb
Release : 1961
Category : Cattle trade
ISBN : UIUC:30112019247862
Author : Anonim
Publisher : Unknown
Page : 502 pages
File Size : 43,8 Mb
Release : 1973
Category : Forests and forestry
ISBN : UCBK:C042267471
Author : Northeastern Forest Experiment Station (Radnor, Pa.)
Publisher : Unknown
Page : 630 pages
File Size : 41,8 Mb
Release : 1963
Category : Forests and forestry
ISBN : WISC:89037105210
Author : Miroslaw M. Czapowskyj,William Everett McQuilkin
Publisher : Unknown
Page : 664 pages
File Size : 44,8 Mb
Release : 1966
Category : Reforestation
ISBN : STANFORD:36105119495054
In 1962 a survey-type study was conducted to evaluate the performance of forest tree species in established plantings on strip-mine spoils of the Anthracite Region of Pennsylvania. Plantations representing a wide range of site conditions in all four anthracite fields were examined.