أعرض تسجيلة المادة بشكل مبسط
| dc.date |
2006-10-30T20:58:58Z |
|
| dc.date |
2006-10-30T20:58:58Z |
|
| dc.date |
1973 |
|
| dc.date.accessioned |
2013-10-16T07:41:14Z |
|
| dc.date.available |
2013-10-16T07:41:14Z |
|
| dc.date.issued |
2013-10-16 |
|
| dc.identifier |
http://hdl.handle.net/1957/3258 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1957/3258 |
|
| dc.description |
Diseased conifer nursery stock, including Douglas-fir, western larch,
and Engelmann spruce, was selected from the U.S. Forest Service nursery
at Coeur d'Alene, Idaho, to determine (1) the most probable cause of
disease, (2) the fate of outplanted diseased stock, and (3) the height
growth of outplanted diseased seedlings. Fusarium spp. were isolated at high frequency--up to 90 percent--from diseased and healthy seedlings and were considered the most probable causal agent. Both shoot and
and root tissue were infected. Mortality of outplanted stock after
three growing seasons was greater for seedlings originally classified
as diseased than for healthy. The difference was most pronounced in
western larch where 50 percent of diseased seedlings died compared to 30 percent of the healthy. The diseased stock that apparently recovered
after two growing seasons had about the same height growth as controls,
whereas seedlings not recovered had very poor growth. It is postulated
that poor soil conditions in the nursery are responsible for the disease
problem. |
|
| dc.language |
en_US |
|
| dc.publisher |
Missoula, Mont. : USDA, Forest Service, Region One, Division of State & Private Forestry |
|
| dc.relation |
Report (United States. Forest Service. Northern Region) |
|
| dc.relation |
no. 73-2 |
|
| dc.title |
Seedling disease at Coeur d'Alene forest nursery and its relation to outplanting survival |
|
| 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