Nitrogen pools and turnover in arable soils under different durations of organic farming: II: Source-and-sink function of the soil microbial biomass or competition with growing plants?

2001 ◽  
Vol 164 (4) ◽  
pp. 421 ◽  
Author(s):  
Jürgen K. Friedel ◽  
Doris Gabel ◽  
Karl Stahr
Keyword(s):  
Microbial Biomass ◽  
Organic Farming ◽  
Soil Microbial Biomass ◽  
Arable Soils ◽  
Soil Microbial ◽  
Nitrogen Pools ◽  
Source And Sink

Detection and quantification of the soil microbial biomass – impacts on the management of agricultural soils

2006 ◽  
Vol 144 (4) ◽  
pp. 285-302 ◽  
Author(s):  
E. A. STOCKDALE ◽  
P. C. BROOKES
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Agricultural Soils ◽  
Soil Processes ◽  
Soil Organisms ◽  
Arable Soils ◽  
Individual Tree ◽  
Carbon And Nitrogen ◽  
Soil Microbial ◽  
Yield Information

Studies of single soil organisms, while useful in specialized cases, e.g. Rhizobia and mycohrrizae, do not yield information on the functioning of the soil ecosystem. This is because most important soil processes, e.g. carbon and nitrogen mineralization, depend upon interactions between entire suites of organisms, many of which still await identification and most of which remain unculturable.For many purposes, treating the soil microbial community as a single, undifferentiated unit, the soil microbial biomass (defined as all soil organisms <5000 μm3 volume), has much to commend it. It is analogous to studying the forest rather than an individual tree and uniquely permits an understanding of the soil–plant–microbe system as a whole, rather than studying only a small part. The present paper reviews the development of methods to measure microbial dynamics over the last century, the evolution of biomass methodologies and how they have helped the study of crucial soil processes such as nutrient and carbon cycling. Possible future directions for this research are also discussed and an explanation set forth of why the manipulation of this huge population (easily comprising 10 tonnes per hectare of living microbial cells in UK arable soils) has, so far, proved elusive.

scholarly journals Soil microbial biomass in organic farming system

2010 ◽  
Vol 40 (11) ◽  
pp. 2419-2426 ◽  
Author(s):  
Ademir Sérgio Ferreira de Araújo ◽  
Wanderley José de Melo
Keyword(s):  
Microbial Biomass ◽  
Organic Farming ◽  
Soil Microbial Biomass ◽  
Farming System ◽  
Soil Microbial ◽  
Organic Farming System

scholarly journals Soil microbial biomass and organic matter fractions during transition from conventional to organic farming systems

Geoderma ◽  
2012 ◽  
Vol 170 ◽  
pp. 227-231 ◽  
Author(s):  
Valdinar B. Santos ◽  
Ademir S.F. Araújo ◽  
Luiz F.C. Leite ◽  
Luís A.P.L. Nunes ◽  
Wanderley J. Melo
Keyword(s):  
Organic Matter ◽  
Microbial Biomass ◽  
Organic Farming ◽  
Soil Microbial Biomass ◽  
Farming Systems ◽  
Soil Microbial ◽  
Organic Farming Systems ◽  
Organic Matter Fractions
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