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G. Heim, J. J. Landsberg, R. L. Watson, P. Brain, Eco-Physiology of Apple Trees: Dry Matter Production and Partitioning by Young Golden Delicious Trees in France and England, Journal of Applied Ecology, Vol. 16, No. 1 (Apr., 1979), pp. 179-194
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Heim et al. (1979) studied this question.
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