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Growth Response of Some Tree Species to Plastic Greenhouse Culture

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In a Lake States nursery, red pine, jack pine, white spruce, and yellow birch seedlings were grown from seed for two seasons in a plastic greenhouse under an extended growing season, and a season of normal length, both with and without supplemental heat. Seedlings in standard outdoor nursery beds served as controls. Greenhouse treatments increased germination and number of live seedlings of red pine and jack pine and the growth of red pine and white spruce. Supplemental heat did not appear to have any effect in the normal season treatment. Early results of an outplanting test indicate higher survival of white spruce and jack pine and a lower survival of red pine from the greenhouse treatments as compared to standard nursery stock. Seedling density and soil fertility should be studied in future trials.
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Document Type: Journal Article

Affiliations: Associate Plant Physiologist, North Central Forest Exp. Sta., U.S. Forest Serv., East Lansing, Mich. Office maintained in cooperation with Michigan State University

Publication date: 1973-01-01

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  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

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