Search for: [References = "29. Riley H., Pommeresche R., Eltun R., Hansen S., Korsaeth A., 2008. Soil structure, organic matter and earthworm activity in a comparison of cropping systems with contrasting tillage, rotations, fertilizer levels and manure use. Agriculture, Ecosystems \& Environment, vol. 124, no. 3\-4, pp. 275\-284."]

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