أعرض تسجيلة المادة بشكل مبسط
| dc.date |
2006-11-21T18:32:50Z |
|
| dc.date |
2006-11-21T18:32:50Z |
|
| dc.date |
1977 |
|
| dc.date.accessioned |
2013-10-16T07:42:18Z |
|
| dc.date.available |
2013-10-16T07:42:18Z |
|
| dc.date.issued |
2013-10-16 |
|
| dc.identifier |
http://hdl.handle.net/1957/3474 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1957/3474 |
|
| dc.description |
Mountain pine beetle infestations in second-growth ponderosa
pine have been chronic in the Little Belt and Big Snowy Mountains
since 1947. In 1976, increasing numbers of attacked trees were
observed. Current infestation intensity averages 82 trees per
hectare. Losses are expected to continue as long as stands
remain stagnates. Commercial sales and thinning to reduce basal
area below 34 m /ha* are recommended. Precautions are given to
prevent population buildup of secondary bark beetles. |
|
| dc.language |
en_US |
|
| dc.publisher |
Missoula, MT. : Forest Insect & Disease Management, USDA, Forest Service, Northern Region, State & Private Forestry |
|
| dc.relation |
Report (United States. Forest Service. Northern Region) |
|
| dc.relation |
no. 77-14 |
|
| dc.relation |
Forest insect & disease management |
|
| dc.title |
Status of mountain pine beetle infestations in second-growth ponderosa pine stands, Little Belt and Big Snowy Mountains, Lewis & Clark National Forest, Montana, 1976 |
|
| dc.type |
Technical Report |
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الملفات في هذه المادة
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لا توجد أي ملفات مرتبطة بهذه المادة.
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هذه المادة تبدو في المجموعات التالية:
أعرض تسجيلة المادة بشكل مبسط