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M. G. R. Cannell, C. K. Njuguna, E. D. Ford, R. Smith, H. M. Ross-Parker, Variation in Yield Among Competing Individuals within Mixed Genotype Stands of Tea: A Selection Problem, Journal of Applied Ecology, Vol. 14, No. 3 (Dec., 1977), pp. 969-985
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Cannell et al. (1977) studied this question.
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