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B. A. D. Hetrick, G. W. T. Wilson, C. E. Owensby, Influence of Mycorrhizal Fungi and Fertilization on Big Bluestem Seedling Biomass, Journal of Range Management, Vol. 42, No. 3 (May, 1989), pp. 213-216
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Hetrick et al. (1989) studied this question.
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