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Microorganisms and Soil Aggregate Stability

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Advances in Soil Science

Part of the book series: Advances in Soil Science ((SOIL,volume 2))

Abstract

A soil aggregate has been defined as “a naturally occurring cluster or group of soil particles in which the forces holding the particles together are much stronger than the forces between adjacent aggregates” (Martin et al., 1955). The terms soil structure and soil aggregation are often used synonymously, but soil aggregates are the basic units of soil structure, rather than the whole. Soil aggregates are formed mainly by physical forces while stabilization is effected by several factors including organic materials, iron and aluminum oxides, and clays. Sequi (1978) considered that the term “aggregation” should be used only when organic binding agents are involved, but this definition seems too narrow to us. The two processes of aggregate formation and stabilization can be concurrent in the soil, and the various stabilizing agents may act in conjunction with each other.

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Authors and Affiliations

  1. Glasshouse Crop Research Institute, Worthing Road, Littlehampton, West Sussex, BN17 6LP, England

    J. M. Lynch

  2. AFRC Letcombe Laboratory, Wantage, Oxon, OX12 9JT, England

    Elaine Bragg

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  1. J. M. Lynch
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  2. Elaine Bragg
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  1. USDA Conservation Production Research Laboratory, 79012, Bushland, Texas, USA

    B. A. Stewart

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Lynch, J.M., Bragg, E. (1985). Microorganisms and Soil Aggregate Stability. In: Stewart, B.A. (eds) Advances in Soil Science. Advances in Soil Science, vol 2. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-5088-3_3

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