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Growth Pattern of Vigorous, Upright Branches of 'Delicious' Apple Trees in Response to Heading-back Pruning and the Effect of Exogenous Growth Regulators, Bud Excision and Scoring on this Growth Pattern

David Richard Ophardt

出版	Cornell University, 1978
URL	http://books.google.com.hk/books?id=3ldPAAAAYAAJ&hl=&source=gbs_api