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Notes: Age Distribution of Needles in Red Pine Crowns

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Three Pinus resinosa tree crowns were analysed to determine the weight distribution of different aged needles. The trees differed in their crown development and little similarity between their comparable whorls was evident. Younger needles always predominated in the upper crown, older ones in the less virgorous lower levels with the maximum weights of each age class and total foliage being in the middle crown.
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Document Type: News

Affiliations: Research and Development Officer, Timber Research and Development Assn., Tylers Green, High Wycombe, Buckinghamshire, England

Publication date: 01 September 1966

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