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Kouda, I.E., E. Morgun, and T.W. Boutton. 2010. Verctic processes and specificity of organic matter properties and distribution in vertisols. Eurasian Soil Science 43(13): 1467-1476

Wellock, M.L., B. Reidy, C.M. Laperele, T. Bolger and G. Kieley. 2011. Soil organic carbon stocks of afforested peatlands in Ireland. Forestry 84(4): 441-451.

Olaleye, A.O., G.E. Akinbola, and B.O. Akintade. 2011. Gravel, Soil Organic Matter, and texture in followed Alfisols, Entisols, and Ultisols: Implication for root and tuber crops. Communication in Soil Science and Plant Analysis. 42(41): 2624-2641.