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Notes: Bias in Subsampling Forest Tree Seed with a Vibratory Electronic Seed Counter

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Subdividing jack pine (Pinus banksiana Lamb.) and white spruce (Picea glauca (Moench) Voss) seedlots containing seeds of naturally varying weights and of unknown quality with a vibratory electronic seed counter did not produce subsamples representative of the populations. The last several subsamples in each seedlot, containing up to 90 percent more empty seeds and weighing up to 70 percent less than the population mean, were most severely biased. Forest Sci. 20:221-223.
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Keywords: Picea glauca; Pinus banksiana; Seed testing; seed analysis; seed counting

Document Type: Miscellaneous

Affiliations: Biological Laboratory Technician at the Institute of Forest Genetics, North Central Forest Experiment Station, USDA Forest Service, Rhinelander, Wisconsin 54501

Publication date: 01 September 1974

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