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Introduction to soil microbiology
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In this paper, the biological processes that take place in the soil and their importance to soil fertility, plant growth, and environmental quality are investigated from both descriptive and functional viewpoints, including microbial ecology, the carbon and nitrogen cycles, mineral transformation, and ecological interrelationships.Abstract:
Characterizes soil microflora from descriptive and functional viewpoints; considers the biological processes that take place in the soil and their importance to soil fertility, plant growth, and environmental quality. Deals with the biochemical basis for soil processes, including microbial ecology, the carbon and nitrogen cycles, mineral transformation, and ecological interrelationships.read more
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Journal ArticleDOI
Assessment of free-living nitrogen fixation activity as a biological indicator of heavy metal toxicity in soil.
TL;DR: The suitability of free-living N2fixing bacteria as biological indicators for heavy metal toxicity in soil was assessed in this paper, where the sensitivity of potential N2-fixation activity by cyanobacteria and aerobic heterotrophic bacteria were assessed using the acetylene reduction assay (ARA) on contaminated soils containing various concentrations of Zn, Cu, Ni, Cd, Cr and Pb.
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Identification of bacterial sources of soil peptidases.
H. J. Bach,J. C. Munch +1 more
TL;DR: The results of inhibition assays suggest that the extracellular peptidases formed by these species were metalloenzymes, which are likely to have contributed to the high proteolytic activity of these bacteria.
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Straw decomposition and nitrogenase activity (C2H2 reduction) by free-living microorganisms from soil: Effects of pH and clay content
Margaret M. Roper,Neil A. Smith +1 more
TL;DR: In this article, the effects of pH and clay content on decomposition of straw and nitrogenase activity (C2H2 reduction) were measured in laboratory experiments using microorganisms extracted from soils collected from two areas (Gunnedah and Cowra) of the wheat belt of New South Wales, Australia.
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Ecotoxicological and microbiological characterization of soils from heavy-metal- and hydrocarbon-contaminated sites
TL;DR: Correlation analysis between principal components determined for physicochemical, microbiological, and ecotoxicological soil properties demonstrated the impact of total and water-extractable contents of heavy metals on toxicity.
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Effects of nitrogen source on crude oil biodegradation
TL;DR: The effects of NH4Cl and KNO3 on biodegradation of light Arabian crude oil by an oil-degrading enrichment culture were studied in respirometers and the lag time was shorter in pH-controlled cultures supplied with ammonia than in nitrate-containing cultures.