Results 211 to 220 of about 42,019 (265)
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Soil Temperature and Soil Heat Flux
2016The soil temperature regime depends on its thermal properties (specific heat, thermal conductivity, thermal diffusivity and thermal admittance). The main factors affecting the thermal regime are water content, soil texture and compaction. The rate of heating (or cooling) of the soil is proportional to its diffusivity which is higher in sandy soils. The
Francisco J. Villalobos +3 more
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1998
When the sun shines on the soil surface, some of the energy is absorbed, heating the soil surface. This heat is lost from the surface through conduction to lower layers of the soil, through heating the atmosphere, and through evaporation of water. Heat transport from the surface to the atmosphere was discussed in Ch. 7.
Gaylon S. Campbell, John M. Norman
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When the sun shines on the soil surface, some of the energy is absorbed, heating the soil surface. This heat is lost from the surface through conduction to lower layers of the soil, through heating the atmosphere, and through evaporation of water. Heat transport from the surface to the atmosphere was discussed in Ch. 7.
Gaylon S. Campbell, John M. Norman
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Heat conduction and heat storage characteristics of soils
Applied Thermal Engineering, 2007Based on a randomly mixed model, in which the constituent parts of the multi-phase medium are all cubic in shape, uniform in size and randomly dispersed, the effective thermal conductivity of the medium is obtained from the thermal properties and volume fractions of the components.
H.-F. Zhang, X.-S. Ge, H. Ye, D.-S. Jiao
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1979
Soil heat flux is sometimes ignored because its magnitude is often small relative to the other terms in the energy balance equation. The daily and yearly sums are normally near zero, but daily values can be significant when the soil is heating in the spring or cooling in the fall.
Leo J. Fritschen, Lloyd W. Gay
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Soil heat flux is sometimes ignored because its magnitude is often small relative to the other terms in the energy balance equation. The daily and yearly sums are normally near zero, but daily values can be significant when the soil is heating in the spring or cooling in the fall.
Leo J. Fritschen, Lloyd W. Gay
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Waste Heat Utilization for Soil Heating in Greenhouses
Transactions of the ASAE, 1982ABSTRACT THE effect of low-temperature, waste heat on diverse greenhouse soils was examined in a 3-yr study. Tem-perature, heat flow and moisture distribution in sand, a peat-vermiculite mixture and Wooster silt-loam were ex-amined. The effect of soil temperature on lettuce growth was also studied.
null D. L. Elwell +2 more
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1994
Ground temperatures have a significant effect on soil engineering behavior and must be considered in the design of frozen ground support systems and other constructed facilities in cold regions. In these problems, temperatures within, under, and around the structure depend on the ground surface temperatures together with the geothermal gradient for the
Orlando B. Andersland, Branko Ladanyi
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Ground temperatures have a significant effect on soil engineering behavior and must be considered in the design of frozen ground support systems and other constructed facilities in cold regions. In these problems, temperatures within, under, and around the structure depend on the ground surface temperatures together with the geothermal gradient for the
Orlando B. Andersland, Branko Ladanyi
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Heat transfer analysis of soil heating systems
International Journal of Heat and Mass Transfer, 2009zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ngo, C. C., Lai, F. C.
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Susceptibility of ectomycorrhizal fungi to soil heating
Fungal Biology, 2010Ectomycorrhizal (EcM) fungi are an important biotic factor for successful tree recruitment because they enhance plant growth and alleviate drought stress of their hosts. Thus, EcM propagules are expected to be a key factor for forest regeneration after major disturbance events such as stand-replacing forest fires.
Kipfer T +4 more
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Radio Frequency Heating for Soil Remediation
Journal of the Air & Waste Management Association, 1999Radio frequency heating (RFH) is a technology that increases the cost-effectiveness of a variety of site remediation technologies by accelerating the rate of contaminant removal. Heating makes the physical, chemical, and biological properties of materials such as contaminants, soil, and groundwater more amenable to remediation.
Stephen L, Price +4 more
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Calibration of soil heat flux sensors
Agricultural and Forest Meteorology, 1998Abstract Soil heat flux is difficult to measure accurately and soil heat flux plates are difficult to calibrate. In this research the reference heat flux was calculated from the temperature gradient and independent thermal conductivity measurements. Reference conductivities, as measured by the non-steady state probe method, have an error of about 2%,
van Loon, W.K.P. +2 more
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