A. N. Baker, R. A. Dunning, Some Effects of Soil Type and Crop Density on the Activity and Abundance of the Epigeic Fauna, Particularly Carabidae, in Sugar-Beet Fields, Journal of Applied Ecology, Vol. 12, No. 3 (Dec., 1975), pp. 809-818
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Baker et al. (1975) studied this question.
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