خيارات البحث
النتائج 1 - 7 من 7
Measurement of Soil Thermal Properties with a Dual-Probe Heat-Pulse Technique
1994
Bristow, Keith L. | Kluitenberg, Gerard J. | Horton, Robert
Although soil thermal properties are required in many areas of engineering, micrometeorology, agronomy, and soil science, they are seldom measured on a routine basis. Reasons for this are unclear, but may be related to a lack of suitable instrumentation and appropriate theory. We developed a theory for the radial conduction of a short-duration heat pulse away from an infinite line source, and compared it with the theory for an instantaneously heated line source. By measuring the temperature response at a short distance from the line source, and applying short-duration heat-pulse theory, we can extract all the soil thermal properties, the thermal diffusivity, heat capacity, and conductivity, from a single heat-pulse measurement. Results of initial experiments carried out on air-dry sand and clay materials indicate that this heat-pulse method yields soil thermal properties that compare well with thermal properties measured by independent methods. Contribution no. 93-430-J from the Kansas Agric. Exp. Stn., Manhattan, KS. Journal paper no. J-15353 of the Iowa Agric. Home Economics Exp. Stn., Ames, IA.
اظهر المزيد [+] اقل [-]Cleanup of agrochemical spills using cotton sorbents.
1994
Choi H. | Moreau J.P. | Srinivasan M.
Effects of some heavy metals on root growth of germinating seeds of Vicia faba.
1994
Misra J. | Pandey V. | Singh N.
Biosorption of pentachlorophenol (PCP) by granular and dispersed anaerobic sludge.
1994
Tham P.T. | Kennedy K.J.
Atmospheric deposition at Pinus radiata sites in the Spanish Basque Country.
1994
Mesanza J.M. | Casado H.
Developing your own automated leaching column system for studying solute transport in clay soil.
1994
Xie R.J. | Fyles J.W. | Mackenzie A.F. | O'Halloran I.P.
Lead accumulation and toxicity in Vallisneria spiralis (L.) and Hydrilla verticillata (l.f.) Royle.
1994
Gupta M. | Chandra P.
