Journal ArticleDOI
Beyond clay: Towards an improved set of variables for predicting soil organic matter content
Craig Rasmussen,Katherine Heckman,William R. Wieder,Marco Keiluweit,Corey R. Lawrence,Asmeret Asefaw Berhe,Joseph C. Blankinship,Susan E. Crow,Jennifer L. Druhan,Caitlin E. Hicks Pries,Erika Marin-Spiotta,Alain F. Plante,Christina Schädel,Joshua P. Schimel,Carlos A. Sierra,Aaron Thompson,Rota Wagai +16 more
TLDR
In this article, the authors demonstrate that other physicochemical parameters are much stronger predictors of SOM content, with clay content having relatively little explanatory power, whereas with increasing moisture availability and acidity, iron-and aluminum-oxyhydroxides emerged as better predictors.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 parameters are much stronger predictors of SOM content, with clay content having relatively little explanatory power We show that exchangeable calcium strongly predicted SOM content in water-limited, alkaline soils, whereas with increasing moisture availability and acidity, iron- and aluminum-oxyhydroxides emerged as better predictors, demonstrating that the relative importance of SOM stabilization mechanisms scales with climate and acidity These results highlight the urgent need to modify biogeochemical models to better reflect the role of soil physicochemical properties in SOM cyclingread more
Citations
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Journal ArticleDOI
Soil organic carbon storage as a key function of soils - A review of drivers and indicators at various scales
Martin Wiesmeier,Livia Urbanski,Eleanor Hobley,Birgit Lang,Margit von Lützow,Erika Marin-Spiotta,Bas van Wesemael,Eva Rabot,Mareike Ließ,Noelia Garcia-Franco,Ute Wollschläger,Hans-Jörg Vogel,Ingrid Kögel-Knabner +12 more
TL;DR: In this paper, the authors identify measurable biotic or abiotic properties that control soil organic carbon (SOC) storage at different spatial scales and could serve as indicators for an efficient quantification of SOC.
Journal ArticleDOI
Conceptualizing soil organic matter into particulate and mineral-associated forms to address global change in the 21st century.
TL;DR: Conceptualizing SOM into POM versus MAOM is a feasible, well-supported, and useful framework that will allow scientists to move beyond studies of bulk SOM, but also use a consistent separation scheme across studies.
Journal ArticleDOI
Global meta-analysis of the relationship between soil organic matter and crop yields
TL;DR: In this article, the authors developed a quantitative model exploring how SOM relates to crop yield potential of maize and wheat in light of co-varying factors of soil management, soil type, and climate.
Journal ArticleDOI
Tamm Review: Influence of forest management activities on soil organic carbon stocks: A knowledge synthesis
Mathias Mayer,Cindy E. Prescott,Wafa E.A. Abaker,Laurent Augusto,Lauric Cécillon,Gabriel W.D. Ferreira,Jason James,Robert Jandl,Klaus Katzensteiner,Jean-Paul Laclau,Jérôme Laganière,Yann Nouvellon,David Paré,John A. Stanturf,Elena Vanguelova,Lars Vesterdal +15 more
TL;DR: In this article, the authors synthesize current evidence regarding the influences of 13 common forest management practices on forest soil C stocks, and identify existing gaps in knowledge and suggest research to address the gaps.
References
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Journal ArticleDOI
Terrestrial Ecoregions of the World: A New Map of Life on Earth
Journal ArticleDOI
Analysis of factors controlling soil organic matter levels in Great Plains grasslands
TL;DR: In this article, a model of soil organic matter (SOM) quantity and composition was used to simulate steady-state organic matter levels for 24 grassland locations in the U.S. Great Plains.
Journal ArticleDOI
Stabilization of organic matter in temperate soils: mechanisms and their relevance under different soil conditions – a review
Margit von Lützow,Ingrid Kögel-Knabner,Klemens Ekschmitt,Egbert Matzner,Georg Guggenberger,Bernd Marschner,Heinz Flessa +6 more
TL;DR: In this article, a review of the mechanisms that are currently, but often contradictorily or inconsistently, considered to contribute to organic matter (OM) protection against decomposition in temperate soils is presented.
Journal ArticleDOI
SoilGrids250m: Global gridded soil information based on machine learning
Tomislav Hengl,Jorge Mendes de Jesus,Gerard B. M. Heuvelink,Maria Ruiperez Gonzalez,Milan Kilibarda,Aleksandar Blagotić,Wei Shangguan,Marvin N. Wright,Xiaoyuan Geng,Bernhard Bauer-Marschallinger,Mario Guevara,Rodrigo Vargas,R. A. MacMillan,Niels H. Batjes,Johan G. B. Leenaars,Eloi Ribeiro,Ichsani Wheeler,Stephan Mantel,Bas Kempen +18 more
TL;DR: Improvements in the relative accuracy considering the amount of variation explained, in comparison to the previous version of SoilGrids at 1 km spatial resolution, range from 60 to 230%.
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Representing Twentieth-Century Space–Time Climate Variability. Part I: Development of a 1961–90 Mean Monthly Terrestrial Climatology
Mark New,Mike Hulme,Phil Jones +2 more
TL;DR: In this article, a 0.5° lat × 0. 5° long surface climatology of global land areas, excluding Antarctica, is described, which represents the period 1961-90 and comprises a suite of nine variables: precipitation, wet-day frequency, mean temperature, diurnal temperature range, vapor pressure, sunshine, cloud cover, ground frost frequency, and wind speed.