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Beyond clay: towards an improved set of variables for predicting soil organic matter content

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Rasmussen, C., Heckman, K., Wieder, W.R., Keiluweit, M., Lawrence, C.R., Berhe, A.A., Blankenship, J.C., Crow, S.E., Druhan, J.L., Hicks Pries, C.E., Marin-Spiotta, E., Plante, A.E., Schadel, C., Schimel, J.P., Sierra, C.A., Thomson, A., and Wagai, R., (2018), Beyond clay: towards an improved set of variables for predicting soil organic matter content. Biogeochemistry. doi : 10.1007/s10533-018-0424-3

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Abstract Improved quantification of the factors controlling soil organic matter (SOM) stabilization at continental to global scales is needed to inform projections of the largest actively cycling terrestrial carbon pool on Earth, and its response to environmental change. Biogeochemical models rely almost exclusively on clay content to modify rates of SOM turnover and fluxes of climate-active CO2 to the atmosphere. Emerging conceptual understanding, however, suggests other soil physicochemical properties may predict SOM stabilization better than clay content. We addressed this discrepancy by synthesizing data from over 5,500 soil profiles spanning continental scale environmental gradients. Here, we demonstrate that other physicochemical [...]

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  • John Wesley Powell Center for Analysis and Synthesis

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noteRasmussen, C., Heckman, K., Wieder, W.R., Keiluweit, M., Lawrence, C.R., Berhe, A.A., Blankinship, J.C., Crow, S.E., Druhan, J.L., Hicks Pries, C.E., Marin-Spiotta, E., Plante, A.E., Schadel, C., Schimel, J.P., Sierra, C.A., Thomson, A., and Wagai, R., (2018), Beyond clay: towards an improved set of variables for predicting soil organic matter content. Biogeochemistry. doi : 10.1007/s10533-018-0424-3

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