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Home Publications National Nursery Proceedings 1982 1-0 Douglas-fir: A bare-root planting option

1-0 Douglas-fir: A bare-root planting option

1-0 seedlings of Douglas-fir from five physiographic regions in northern California and western Oregon were lifted monthly in winter in Humboldt Nursery, stored at 1° C, and planted in spring in the region of seed origin. Field survival indicated that the calendar periods for safe lifting span 2 or 3 months, and closely match those determined for 2-0 seedlings of similar sources in earlier trials. After one summer, survival of 1-0 seedlings was 90 percent in the southern Klamath Mountains, 94 and 99 percent in the King and Oregon Coast Ranges, and 84 and 88 percent in the Eastern Siskiyou Mountains and Oregon Cascade Range. Browsing mammals and competing vegetation reduced seedling survival and growth. Mortality the second summer ranged from 3 percent in the Coast Range to 17 percent in the Eastern Siskiyous. Increase in height ranged from zero in the Klamath Mountains to about fourfold in the Coast Range. With protection, successful plantation establishment with 1-0 Douglas-fir is attainable in all five regions.


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Author(s): James L. Jenkinson, James A. Nelson

Publication: National Nursery Proceedings - 1982

Event: Western Nurserymen's Conference
1982 - Medford, OR

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