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Effects of Nursery Fertilization on Outplanted Douglas-Fir

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To test the effects of late nursery fertilization on outplanted 2-0 Douglas-fir, seedling lots from five seed sources, half of each fertilized with 50 pounds of nitrogen per acre and half unfertilized, were outplanted at the University of Washington's Pack Forest. Survival and leader growth were recorded for five years (1957-1961), total height measured in 1961, and the data analyzed statistically. Application of nitrogen fertilizer in the nursery late in the growing season significantly increased field survival. Survival varied with seed source, but was influenced by planting blocks. Fertilized trees grew faster than unfertilized trees as measured by leader growth. Fertilized trees were taller than unfertilized trees at th end of five years, but height was influenced by planting blocks. Effects of fertilization were more pronounced in the slowest growing block.
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Document Type: Journal Article

Affiliations: Associate Dean--Research, College of Forestry, University of Washington, Seattle

Publication date: 1966-02-01

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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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