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Seeding Depth--Its Influence on Establishment of Direct-Seeded Pine in the South Carolina Sandhills

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Field and greenhouse studies were undertaken in 1960 to determine the effects of seeding depth on the germination and establishment of direct-seeded longleaf and slash pines in the South Carolina Sandhills. Based upon data on seedling survival, optimum seeding depths were determined. Under field conditions the recommended depth tolerance for longleaf pine was ¼ to ¾ inch, and for slash pine ½ to ¾ inch. In the greenhouse, under a controlled environment, the optimum seeding depth for longleaf pine was between 1/8 and ½ inch, and for slash pine between 1/8 and ¾ inch. Since the differences in optimum depths between the field and greenhouse trials can be attributed primarily to the added effects of seed displacement due to wind and water erosion, the above field depths are recommended for Sandhill sites. To improve seedling survival and to obtain adequate stocking, it is apparent that seed coverage is required when direct-seeding pine on cleared or furrowed sandy sites. Mechanical refinement of seeding machines to allow for correct seed placement is an important factor in achieving this objective. These investigations also showed that seed of both species germinated more rapidly at the recommended depths of sowing and not only began germination sooner, but maintained this advantage at the termination of a 50-day growth period.
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Document Type: Journal Article

Affiliations: Associate Professor of Forestry, School of Forestry, The Pennsylvania State University, University Park, Pa.

Publication date: 1963-12-01

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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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