soil respiration measurement Articles

  • Laboratory test system to measure microbial respiration rate

    This study reports a sensible, accurate and economic method for continuous measuring microbial respiration. The measuring principle is an open system, with a continuous air-flow through. Evolved CO2 is absorbed and precipitated as carbonate by a Ba(OH)2 solution, causing a stoichiometrical decrease in ionic strength of the solution and in electrical conductivity. ...


    By Inderscience Publishers

  • Comparison of the performance of statistical models that predict soil respiration from forests

    Soil respiration (Rs) is an important source of CO2 to the atmosphere, yet understanding the processes controlling the combined autotrophic and heterotrophic components has proven challenging. Numerous statistical models have been developed to explain Rs as a function of physical and chemical conditions, but there has been little effort to systematically evaluate and compare the performance of ...

  • Silver Membranes in Monitoring Respirable Crystalline Silica

    Crystalline silica, most commonly found in the form of quartz, is a basic component of the earth; it’s found in soil, sand granite, and other minerals. During many industrial processes, crystalline silica is released as particles that are 100 times smaller than beach sand.1 Due to their size, these mineral particles cannot easily be cleared by human lungs. Instead, they persist in the ...


    By Sterlitech Corporation

  • Effects of heavy metal pollution on the soil microbial activity

    The effects of heavy metals on soil microbial processes were investigated over a period of six weeks. Analytical grade (Sigma) sulphate salts of copper, zinc and nickel were added individually and in combinations to soil samples and incubated in different plastic pots. Samples were taken from the pots forthnightly and the rates of microbial carbon and nitrogen mineralization, microbial biomass ...

  • Lichens show that fungi can acclimate their respiration to seasonal changes in temperature

    Five species of lichens, the majority members of a soil-crust community (Cladonia convoluta, Diploschistes muscorum, Fulgensia fulgens, Lecanora muralis, Squamarina lentigera) showed seasonal changes of temperature sensitivity of their dark respiration (DR) to such an extent that several substantially met the definition of full acclimation, i.e. near identical DR under different nocturnal ...


    By Springer

  • Soil-mixing effects on inorganic nitrogen production and consumption in forest and shrubland soils

    Abstract Soils that are physically disturbed are often reported to show net nitrification and NO3 – loss. To investigate the response of soil N cycling rates to soil mixing, we assayed gross rates of mineralization, nitrification, NH4+ consumption, and NO3 – consumption in a suite of soils from eleven woody plant communities in Oregon, New Mexico, and Utah. Results ...


    By Springer

  • The Role of Soil Moisture on our Climate, Weather and Global Warming

    Global warming is a topic that has received much attention in the media, especially during the hot days of summer. The process by which carbon dioxide (CO2) in the atmosphere prevents the escape of thermal energy into outer space is known as the greenhouse effect. The higher the carbon dioxide levels in the atmosphere the less thermal energy that can escape thus an increasing ...

  • Iron Oxyhydroxide reduction in simulated wetland soils: Effects of mineralogical composition of Iris paints

    Reducing conditions in soils can be documented by the voltage measured between Pt and reference electrodes (Eh) or by using dyes like ,-dipyridyl for identifying reduced species (such as Fe2+). Indicator of Reduction in Soils (IRIS) tubes have been recently introduced as an alternative approach for documenting reducing conditions in soils, where a synthetic Fe oxyhydroxide painted on polyvinyl ...

  • Microbial community structure and functioning along metal pollution gradients

    Toxic effects of heavy metals on soil microorganisms have been confirmed in a number of laboratory studies. However, most real‐field studies do not allow for strong general conclusions due to a range of problems, such as pseudoreplication and confounding factors, which are almost impossible to control for with the most commonly used polluted‐vs.‐unpolluted or random sampling designs. Effects ...


    By John Wiley & Sons, Ltd.

  • Bioventing

    Introduction Bioventing is a promising new technology that stimulates the natural in situ biodegradation of any aerobically degradable compounds in soil by providing oxygen to existing soil microorganisms. In contrast to soil vapor vacuum extraction, bioventing uses low air flow rates to provide only enough oxygen to sustain microbial activity. Oxygen is most commonly supplied through direct air ...

  • Regional Patterns in Carbon Cycling Across the Great Plains of North America

    The large organic carbon (C) pools found in noncultivated grassland soils suggest that historically these ecosystems have had high rates of C sequestration. Changes in the soil C pool over time are a function of alterations in C input and output rates. Across the Great Plains and at individual sites through time, inputs of C (via aboveground production) are correlated with precipitation, however, ...


    By Springer

  • Terrestrial sequestration

    Trees play a key role in the environment's natural landscape due to their ability to prevent erosion. The Spanish Government says it will plant 45 million trees over the next four years to counter desertification caused by global warming. The massive tree–planting scheme aims to reduce the amount of carbon dioxide (CO2) in the atmosphere, the cause of global warming. It estimates that in the long ...


    By Erosion Control Forum

  • Increased demand for XRF analyser hire

    Steve Drake, NDT Market Manager at Ashtead Technology believes that XRF is one of the most important technologies in the company’s fleet of NDT and environmental testing instruments. “With a small amount of training, almost anyone can implement detailed inspections in a wide variety of applications, and with most instruments being lightweight and robust, XRF analysers are among the ...


    By Ashtead Technology Ltd

  • Hired metals analyser ensures remediation success

    Cognition Land and Water Ltd, a UK based remediation specialist, has hired a portable XRF metals analyser to improve the speed of remediation work at a project in London’s Kentish Town. The project had a major impact on local residents so timescales were extremely tight but Cognition’s Charlie Jarvis says “It would not have been possible to meet the deadline without the use of ...


    By Ashtead Technology Ltd

  • Dust monitoring

    Generally, two different approaches are used to measure the amount of dust deposited on a surface; Determination of the soiling of a surface, by a change in its properties; Determination of the quantity of dust deposited, by weight. WHAT IS DUST? Dust is a generic term used to describe fine particles that are suspended in the atmosphere. Dust comes from a wide variety of sources, including soil, ...


    By Queensland Laboratory

  • Combining HVME and Enhanced Bioremdiation for Gasoline Contamination in Groundwater.

    ABSTRACT A leaking underground storage tank at a commercial petroleum retail site located in Haskell, Texas resulted in soil and groundwater petroleum hydrocarbon contamination. This contamination, including benzene, toluene, ethylbenzene, and total xylenes (BTEX) and total petroleum hydrocarbons (TPH) migrated down-gradient below a road and neighboring property. Access below the adjacent roadway ...


    By Regenesis

  • Combining HVME and Enhanced Bioremediation for Gasoline Contamination in Groundwater

    A leaking underground storage tank at a commercial petroleum retail site located in Haskell, Texas resulted in soil and groundwater petroleum hydrocarbon contamination. This contamination, including benzene, toluene, ethylbenzene, and total xylenes (BTEX) and total petroleum hydrocarbons (TPH) migrated down-gradient below a road and neighboring property. Access below the adjacent roadway was ...


    By Regenesis

  • Understanding and Monitoring Hydrocarbons in Water

    Untitled Document 1. Introduction Oil contamination continues to be a very hot topic, due largely in part to recent catastrophic events with shipping ...


    By Arjay Engineering Ltd.

  • Recent Federal Developments

    TSCA/FIFRA EPA Extends Comment Period For Draft Guidance For Pesticide Registrants On Notifications, Non-notifications, And Minor Formulation Amendments: On October 5, 2017, the U.S. Environmental Protection Agency (EPA) issued a notice of extension of the comment period for the draft guidance  ...


    By Bergeson & Campbell, P.C.

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