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Kiln Temperatures for Northern White Pine Cones

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Kilns have been used for extracting conifer seeds from cones for a considerable number of years. However, until comparatively recently these kilns were operated largely on an empirical basis. In the present paper results are reported of carefully controlled studies to determine safe working temperatures and humidities. The work of Messrs. Rietz and Torgeson shows that a kiln treatment up to 140° F. for a duration of 12 hours did not reduce the vigor of germination of white pine seed. Kiln temperatures of 160° F. definitely reduce the viability of the seed.
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Document Type: Journal Article

Affiliations: Forest Products Laboratory

Publication date: 1937-09-01

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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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