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Blackbercy seed germination and earlier seedling emergence were increased by extending the duration of sulfuric acid scarification to 3 hours in an ice bath prior to after-ripening. Increased duration of acid treatment decreased endocarp thickness and seed weight A significant negative correlation was found between endocarp thickness and percent germination, but evaluations of different genetic clones indicate that other inherent factors are also involved in seed germinability.
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Moore et al. (1974) studied this question.
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