Results 261 to 270 of about 41,939 (305)

Effect of soil aggregation on the biodegradation of phenanthrene aged in soil

Environmental Pollution, 2003
A study was conducted to determine the possible role of soil aggregates in the sequestration of phenanthrene and thus in the declined biodegradation of the hydrocarbon. Phenanthrene aged in Lima loam (2-mm aggregates) showed declined biodegradation with time of aging to the test bacterium P5-2 capable of using sorbed phenanthrene.
K, Nam, J Y, Kim, D I, Oh
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Chromium Diffusion and Reduction in Soil Aggregates

Environmental Science & Technology, 2001
The distribution of metal contaminants such as chromium in soils can be strongly localized by transport limitations and redox gradients within soil aggregates. Measurements of Cr(VI) diffusion and reduction to Cr(III) were obtained in soil columns representing transects into soil aggregates in order to quantify influences of organic carbon (OC) and ...
T K, Tokunaga, J, Wan, M K, Firestone, T C, Hazen, E, Schwartz, S R, Sutton, M, Newville   +6 more
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Dynamics of Soil Aggregation

1966
Publisher Summary This chapter discusses the factors and mechanisms governing the formation and destruction of water-stable soil aggregates. The formation and degradation of water-stable aggregates comprise a complex interrelationship of physical, biological, and chemical reactions.
R.F. Harris, G. Chesters, O.N. Allen
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Soil aggregation in the seedbed: A review. I. Properties of aggregates and beds of aggregates

Soil and Tillage Research, 1989
Tillage improves soil conditions for plant growth by altering the aggregate size distribution which affects the mechanical, physical and agronomic properties of the soil. Properties of individual aggregates and how these relate to seedbed performance are reviewed.
M.V. Braunack, A.R. Dexter
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Soil Aggregation in Relation to Various Soil Constituents

Soil Science Society of America Journal, 1957
Abstract The relative importance of diverse factors affecting aggregation in four Wisconsin soil types was studied by multiple regression analyses. Single and combined effects of pH and contents of organic matter, microbial gum, clay, and free iron oxide were considered.
G. Chesters, O. J. Attoe, O. N. Allen
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Stability of soil aggregate in loamy soils of Slovakia

Journal of Elementology, 2017
Stability of soil aggregates is affected by dozens different factors and their individual effects are hardly discernable. For this reason, we investigated the structure of the top layer (to a depth 0.2 m) of loamy soils (Haplic Fluvisol, Mollic Fluvisol and Calcaric Chernozem), at three sites (Šulekovo, Trakovice and Bučany) in the north-western part ...
Vladimír Šimanský, Jerzy Jonczak, Vladimír Šimanský, Miroslav Kravka   +3 more
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Variation of soil aggregation and intra-aggregate carbon by long-term fertilization with aggregate formation in a grey desert soil

CATENA, 2017
Abstract A long-term field experiment was established in 1990 to evaluate the impact of mineral fertilizer (N and NPK) and organic material (manure and crop residues) application on soil aggregation and organic carbon (C) accumulation in an intensively cultivated grey desert soil in northwestern China. The long-term addition of organic materials with
Maibo Jiang, Xihe Wang, Yunhao Liusui, Chao Han, Chengyi Zhao, Hua Liu   +5 more
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The Role of Soil Aggregates in Soil Erosion Processes

1998
Aggregate size and stability represent two soil characteristics that may rapidly change in response to changes in climatic conditions and land-use. Their roles in soil erosion processes have always been recognised but their sizes and stability have rarely been used in formula or algorithms Several erosion processes are discussed here and possible roles
Dino Torri, Rossano Ciampalini, Pietro Accolti Gil   +2 more
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Possible role of soil microorganisms in aggregation in soils

Plant and Soil, 1994
In many soils, roots and fungal hyphae, especially those of vesicular arbuscular mycorrhizal (VAM) fungi, stabilize macroaggregates (>250 μm diameter); organic residues, bacteria, polysaccharides and inorganic materials stabilize microaggregates (
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Nitrogen addition stimulates soil aggregation and enhances carbon storage in terrestrial ecosystems of China: A meta‐analysis

Global Change Biology, 2021
Xiaofei Lu, Enqing Hou, Frank S Gilliam   +2 more
exaly