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Hydric Soil Indicators in Mollisol Landscapes
2000Mollisols are mineral soils that usually develop under prairie vegetation. They are characterized by relatively thick, dark surface horizons resulting from an increased organic matter content, which can present problems for hydric soil identification due to the lack of visible iron-based redoximorphic features (Chapters 7 and 8) in the upper part of ...
James Thompson, Jay Bell
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1983
Publisher Summary Mollisols are mineral soils that have a mollic epipedon (dark-colored surface horizon with greater than 50 % base saturation as determined by the ammonium-acetate method) or have a surface horizon that after mixing to a depth of 18 cm meets all requirements for a mollic epipedon except thickness. It also has an upper subhorizon that
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Publisher Summary Mollisols are mineral soils that have a mollic epipedon (dark-colored surface horizon with greater than 50 % base saturation as determined by the ammonium-acetate method) or have a surface horizon that after mixing to a depth of 18 cm meets all requirements for a mollic epipedon except thickness. It also has an upper subhorizon that
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Long‐Term Changes in Mollisol Organic Carbon and Nitrogen
Journal of Environmental Quality, 2009Conversions of Mollisols from prairie to cropland and subsequent changes in crop production practices in the Midwestern USA have resulted in changes in soil organic matter. Few studies have used archived samples, long‐term resampling of soils to a depth of 1 m, and space for time studies to document these changes. We resampled soils by depth (0–100 cm)
Mark B, David +3 more
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Lead-organic matter interactions in a mollisol
Soil Biology and Biochemistry, 1979Abstract Samples from the surface layer (0–15 cm) of a cultivated Typic Haplaquoll, collected in the fall of 1975 from field plots amended with variable amounts of Pb in the spring of 1969 and with ground corn cobs in 1973 and 1974 (22.4 tons ha−1), were analyzed for organic N, total Pb, exchangeable- and soluble-Pb, specifically-adsorbed Pb, and ...
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Soluble Organic Carbon in a Biosolids‐Amended Mollisol
Journal of Environmental Quality, 1999AbstractOrganic matter can be mobilized from many sources and transported in soil by precipitation, snowmelt, and water table fluctuations. Knowledge of the potential fluxes of soluble organic C in different kinds of soil is essential to improve global C budgets.
Nizhou Han, Michael L. Thompson
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The impact of erosion on the classification of Mollisols in Iowa
Canadian Journal of Soil Science, 2012Fenton, T. E. 2012. The impact of erosion on the classification of Mollisols in Iowa. Can. J. Soil Sci. 92: 413–418. The fertile black soils in the Great Plains and Western States of the United States are dark brown Chernozems in the Canadian system of soil taxonomy and Mollisols, when a mollic epipedon is present, according to the United States soil ...
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Changes in the atrazine extractable residues in no-tilled Mollisols
Soil and Tillage Research, 2007Abstract The effect of application dose and soil organic matter (SOM) stratification on changes in atrazine (6-chloro- N 2 -ethyl- N 4 -isopropyl-1,3,5-triazine-2,4-diamine) extractable residues (ER) were investigated. Two soils [Entic Haplustoll (EH) and Typic Hapludoll (TH)] with contrasting SOM content and form and without previous atrazine ...
S. Hang +5 more
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Soluble silicon in differently textured mollisols of Argentina
Geoderma Regional, 2018Fil: Chirkes, Johanna Denise. Universidad de Buenos Aires. Facultad de Agronomia; Argentina.
Chirkes, Johanna Denise +2 more
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The Ultrastructure of Clay-Humic Complexes in an Iowa Mollisol
2009Abstract The chemical and physical activity of clay minerals in soils, particularly in surface horizons, is significantly mediated by interactions with organic components. And the reactivity of soil organic matter, including its resistance to decomposition, is regulated by interactions with clay minerals.
David A. Laird, Michael L. Thompson
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