أعرض تسجيلة المادة بشكل مبسط
| dc.date |
2006-12-07T15:54:10Z |
|
| dc.date |
2006-12-07T15:54:10Z |
|
| dc.date |
1986 |
|
| dc.date.accessioned |
2013-10-16T07:43:13Z |
|
| dc.date.available |
2013-10-16T07:43:13Z |
|
| dc.date.issued |
2013-10-16 |
|
| dc.identifier |
http://hdl.handle.net/1957/3645 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1957/3645 |
|
| dc.description |
A permanent study was established in 1970 and 1971 to measure the impact,
spread, and intensification of dwarf mistletoe on precommercially thinned
Douglas-fir and lodgepole pine in Montana. Mean diameter growth on all plots
was reduced 21 percent in Douglas-fir, but the reduction is only significant at
the 0.15 level. No diameter growth reduction occurred in the lodgepole pine.
Height growth was not affected in either species. Infected trees, as a percent
of the total number of trees in the study, increased from 3.4 percent in 1970
to 9.2 percent in 1983 in Douglas-fir, and from 1.8 percent in 1971 to 7.4
percent in 1984 in lodgepole pine. Dwarf mistletoe rating, a measure of
infection intensity, increased in some trees, decreased in some, and did not
change in others.
There was no effect of thinning at this young age and low dwarf mistletoe
intensity. Dwarf mistletoe intensity and impact may increase as the stands
mature. |
|
| dc.language |
en_US |
|
| dc.publisher |
Missoula, Mont. : USDA Forest Service, Northern Region |
|
| dc.relation |
Report (United States. Forest Service. Northern Region) |
|
| dc.relation |
no. 86-6 |
|
| dc.relation |
Forest pest management |
|
| dc.title |
Growth impact, spread, and intensification of dwarf mistletoe in Douglas-fir and lodgepole pine in Montana |
|
| dc.type |
Technical Report |
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الملفات في هذه المادة
|
لا توجد أي ملفات مرتبطة بهذه المادة.
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هذه المادة تبدو في المجموعات التالية:
أعرض تسجيلة المادة بشكل مبسط