Results 231 to 240 of about 55,968 (259)

The significance of microbial biomass sulphur in soil

Biology and Fertility of Soils, 1996
The soil microbial biomass S fraction of total organic S in soil is considered to be relatively labile and the most active S pool for S turnover in soil. Its significance has been demonstrated in studies of S deficiency in agronomic situations and in those of S pollution from high atmospheric inputs.
M. R. Banerjee, S. J. Chapman
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Evaluation of soil microbial biomass methodology

Toxicological & Environmental Chemistry, 1991
Six methods, used for the determination of soil microbial biomass/activity, were assessed for their sensitivity to distinguish between four varying soils. Of the methods assessed, substrate‐induced respiration (SIR) demonstrated the greatest degree of sensitivity in detecting differences in microbial biomass/activity between the four soils.
S.C. Hulm, D.L. Castle, K. Cook, A. Self, M. Wood   +4 more
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Arylsulfatase Activity of Microbial Biomass in Soils

Soil Science Society of America Journal, 1999
Abstract Quantification of the different pools of enzyme activity in soils (intra‐ and extracellular) is desired to assess the contribution of the microbial community to specific enzyme reactions and ecological changes in soils.
Susanne Klose, M. A. Tabatabai
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Soil microbial biomass and its controls

Journal of Forestry Research, 2005
Microbial biomass represents a relatively small standing stock of nutrients, compared to soil organic matter, but it can act as a labile source of nutrients for plants, a pathway for incorporation of organic matter into the soil, and a temporary sink for nutrients. This review describes several factors controlling the dynamics of soil microbial biomass.
Zhang Jiang-shan, Guo Jian-fen, Chen Guang-shui, Qian Wei   +3 more
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Influence of macroclimate on soil microbial biomass

Soil Biology and Biochemistry, 1989
Soils from 12 agricultural long-term experimental fields located in contrasting climatic regions were used to assess the influence of macroclimate on soil microbial biomass (Cmicr). Cmicr was measured using the substrate-induced respiration technique.
H. Insam, D. Parkinson, K.H. Domsch
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Urease activity of microbial biomass in soils

Soil Biology and Biochemistry, 1999
Separation of the diAerent pools of enzyme activity in soils (intra- and extracellular) is needed to assess the contribution of the microbial community to specific enzyme reactions. Microbial biomass C and N were determined by the chloroform fumigation method, and urease activity was assayed at the optimal pH (THAM buAer, pH 9.0) in 10 surface soils ...
Susanne Klose, M.A. Tabatabai
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The Significance of Soil Microbial Biomass Estimations

2017
This chapter discusses the significance of utilizing microbial biomass values for investigating nutrient cycling in disturbed and nondisturbed ecosystems. Most biomass estimations are from temperate zone soils under agricultural cultivation, grassland, or forest.
J. L. SMITH, E. A. PAUL
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Effects of sulfonamide and tetracycline antibiotics on soil microbial activity and microbial biomass

Chemosphere, 2005
Increasingly often soil residual concentrations of pharmaceutical antibiotics are detected, while their ecotoxic relevance is scarcely known. Thus, dose related effects of two antibiotics, sulfapyridine and oxytetracycline, on microorganisms of two different topsoils were investigated.
Sören, Thiele-Bruhn, Iris-Constanze, Beck   +1 more
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MICROBIAL BIOMASS MEASUREMENT IN ACIDIC SOIL

Soil Science, 1991
The chloroform fumigation-incubation method for estimating soil microbial biomass is applicable to most soils; but, problems are associated with its use with extremely acidic soils and with soils amended with carbonaceous substrates. To evaluate the basis for these difficulties, this project was commenced with the objectives of (a) evaluating the ...
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Microbial Biomass and Necromass in Austrian Soils

Soil organic carbon (SOC) is a key indicator of healthy soils. Among the sources contributing to the SOC pool, the role of microbial biomass and especially necromass is often overlooked. Microbial necromass sometimes reaches 40 times of the microbial biomass, emphasizing the role of soil microorganisms in carbon sequestration.
Dmytro Monoshyn, Marion Mittmannsgruber, Elisabeth Wiedenegger, Edith Gruber, Rajasekaran Murugan, Erich Inselsbacher, Johann G. Zaller   +6 more
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