A. D. Bradshaw, M. J. Chadwick, D. Jowett, R. W. Lodge, R. W. Snaydon, Experimental Investigations into the Mineral Nutrition of Several Grass Species: Part III. Phosphate Level, Journal of Ecology, Vol. 48, No. 3 (Oct., 1960), pp. 631-637
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Bradshaw et al. (1960) studied this question.