H. Clark, P. C. D. Newton, C. C. Bell, E. M. Glasgow, Dry Matter Yield, Leaf Growth and Population Dynamics in Lolium perenne/ Trifolium repens-Dominated Pasture Turves Exposed to Two Levels of Elevated CO2, Journal of Applied Ecology, Vol. 34, No. 2 (Apr., 1997), pp. 304-316
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Clark et al. (1997) studied this question.
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