matric potential Articles
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The porous surface model, a novel experimental system for online quantitative observation of microbial processes under unsaturated conditions
Water is arguably the most important constituent of microbial microhabitats due to its control of physical and physiological processes critical to microbial activity. In natural environments, bacteria often live on unsaturated surfaces, in thin (micrometric) liquid films. Nevertheless, no experimental systems are available that allow real-time observation of bacterial processes in liquid films of ...
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Measuring the Soil Water Retention Curve with the Stevens pF Matric Potential Sensor and Hydra Probe II Soil Moisture Sensor
The Stevens pF Sensor is a unique matric potential probe, which is used to measure the soil water potential of a soil - the force with which water is held within the soil and how much energy is needed to overcome this force to extract water from the soil. Unlike traditional tensiometers such as gypsum blocks, the Stevens pF Sensor utilizes a patented heating element to measure soil water ...
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Determination of Organochlorine Pesticides and Polychlorinated Biphenyls Using GC/MS/MS Operated in the MRM Mode
This paper describes use of a triple quadrupole GC/MS/MS method using Multiple Reaction Monitoring (MRM) mode for sensitive and selective detection and quantitation of Organochlorine pesticides and PCBs. A database with optimized MRM transitions for all of the OCPs and PCBs, including relative retention times for all components, makes method setup possible within minutes. The use of GC/MS/MS MRM ...
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The development of a coupled model (PCPF-SWMS) to simulate water flow and pollutant transport in Japanese paddy fields
A new coupled model (PCPF–SWMS) was developed for simulating fate and behavior of pollutant in paddy water and paddy soil. The model coupled the PCPF- 1, a lumped model simulating pesticide concentrations in paddy water and 1 cm-surface sediment compartment, and the SWMS-2D, a finite element numerical model solving Richard’s and advection-dispersion equations for solute transport in soil ...
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Correlation between air permeability and saturated hydraulic conductivity: unburned and burned soils
Prior research has shown a log–log correlation between ex situ air permeability (ka) measured at a matric potential of –50 and –100 cm H2O and saturated hydraulic conductivity (Ksat) in agricultural soils. We examined the applicability of a previously established log ka vs. log Ksat predictive relation in unburned and burned woodland–chaparral and coniferous soils. Specifically, we measured in ...
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OSU researchers deploy Stevens equipment in study of green infrastructure treatment for groundwater runoff - Case Study
Stormwater runoff pollution is a serious issue that faces almost every urban and suburban environment. In older city infrastructure, runoff from roofs, parking lots, and streets flows directly into the sewer system and must be handled by the municipal wastewater treatment facility, increasing the amount of work the system must undertake. For the past 30 years, the infrastructure for ...
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Soil Physics Workshop – Syllabus
Soil Hydrology with the Stevens HydraProbe Soil Sensor This year at the Meteorological Technology World Expo 2018 event in Amsterdam Stevens is excited to present a 2-hour Soil Physics Workshop. The interactive lecture will be hosted by Steven’s own Soil Scientist & Geochemist / Certified Professional HydrologistKeith Bellingham. Course Summary Knowledge of soil moisture and the ...
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CEPHaS Project Briefing - GP2 Data Logger - Case Study
Recent Activities in Soil Physics The CEPHaS project is a joint undertaking between colleagues in Zambia, Zimbabwe, Malawi and the UK to strengthen our shared capacity to study how conservation agriculture practices affect the behaviour of water in soil, crop and groundwater systems. Key to this is the use of new methods to study soil water, both in the field and the laboratory. The University ...
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