Results 131 to 140 of about 598 (177)

Physical properties of a Mollisol, an Oxisol and an Inceptisol

Soil and Tillage Research, 1990
Abstract An Inceptisol (Andept) from Ecuador, an OOxisol (Ustox) from Columbia and a Mollisol (Udoll) from the U.S.A. were studied. The clay in the Andept was >85% amorphous with allophane being predominant. The Ustox contained sesqui-oxides of iron and aluminum and kaolinite, while the Udoll contained hydrous mica, quartz and kaolinite in the clay ...
W.E. Larson, W.A. Padilla
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Mollisols properties and changes in Ukraine and China

Chinese Geographical Science, 2011
Soils are the foundation of civilizations and the basis for human food production. Mollisols in Ukraine and Northeast China are two out of the four major Mollisol regions in the world. The natural areas from which Mollisols developed are the prairies and steppes that experience temperate and freezing conditions. This review paper introduces the general
Yuri S. Kravchenko, Xingyi Zhang, Xiaobing Liu, Chunyu Song, Richard M. Cruse   +4 more
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Fractionation of Phosphorus in a Mollisol Amended with Biosolids

Soil Science Society of America Journal, 1999
Information about soil P fractions is useful to predict the bioavailability of P in soil as well as to predict the likelihood of its transport. In this study, we used a sequential fractionation procedure to investigate the forms of P in a Mollisol amended at the soil surface with biosolids (i.e., anaerobically digested sewage ...
Yaobing Sui, Michael L. Thompson, Chao Shang   +2 more
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Chapter 4 Mollisols

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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Hydric Soil Indicators in Mollisol Landscapes

2000
Mollisols 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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Long‐Term Changes in Mollisol Organic Carbon and Nitrogen

Journal of Environmental Quality, 2009
Conversions 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, Gregory F, McIsaac, Robert G, Darmody, Rex A, Omonode   +3 more
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Soluble Organic Carbon in a Biosolids‐Amended Mollisol

Journal of Environmental Quality, 1999
AbstractOrganic 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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Soil Characteristics Involved in Phosphorus Sorption in Mollisols

Soil Science Society of America Journal, 2016
Core Ideas Predictive models of phosphorus sorption were developed for a group of Mollisols. Al
Cabello Carasso, Maria Julia, Gutiérrez Boem, Flavio Hernán, Quintero, Cesar Eugenio, Rubio, Gerardo   +3 more
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Genesis of a Vertisol and an Associated Mollisol in Northern Utah

Soil Science Society of America Journal, 1983
Abstract The genetic relationship between a Vertisol (Chromoxerert) and an associated Mollisol with an argillic horizon (Palexeroll) was investigated. These soils occur in the Wasatch Mountains of northern Utah and have similar parent materials, altitudes, and slope gradients. Erosion is prevalent on the Vertisols
R. C. Graham, A. R. Southard
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Lead-organic matter interactions in a mollisol

Soil Biology and Biochemistry, 1979
Abstract 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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