Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils
Thermal conductivity increased with increasing soil water content. Clayey soils had lower thermal conductivity than sandy soils at all water levels studied. Thermal conductivity ranged from 0.37 to 1.42 for sandy loam, from 0.37 to 1.90 for loam, from 0.38 to 1.71 for sandy clay loam, and from 0.39...
| Main Authors: | , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Ovid Technologies
1985
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/81492 |
| _version_ | 1855535650098380800 |
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| author | Ghuman, B.S. Lal, R. |
| author_browse | Ghuman, B.S. Lal, R. |
| author_facet | Ghuman, B.S. Lal, R. |
| author_sort | Ghuman, B.S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Thermal conductivity increased with increasing soil water content. Clayey soils had lower thermal conductivity than sandy soils at all water levels studied. Thermal conductivity ranged from 0.37 to 1.42 for sandy loam, from 0.37 to 1.90 for loam, from 0.38 to 1.71 for sandy clay loam, and from 0.39 to 0.41 mcal/s [middle dot] cm [degrees]C for clay soils at water contents from 0.02 to 0.16 cm3 cm-3. Thermal conductivity differences among soils were smaller at lower soil water contents than at higher water contents. Thermal conductivity did not continuously increase with water content for the washed sand. Soil containing gravel had lower thermal conductivity than gravel-free soil. Thermal conductivity for a gravelly soil measured in situ was appreciably lower than that of the sieved and homogeneous laboratory soil columns. Thermal diffusivity of sandy or loamy soils increased with water content to the peak and then decreased with further increase in water content. Soils of fine texture, however, did not exhibit a distinct thermal diffusivity peak. Volumetric heat capacity calculated from measured values of thermal conductivity and diffusivity agreed closely with those estimated from volume fractions of soil components (by the de Vries equation) for coarse- to medium-textured soils, but not for fine-textured soils. At air-dry wetness, clayey soils generally had higher thermal capacity than sandy soils. |
| format | Journal Article |
| id | CGSpace81492 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1985 |
| publishDateRange | 1985 |
| publishDateSort | 1985 |
| publisher | Ovid Technologies |
| publisherStr | Ovid Technologies |
| record_format | dspace |
| spelling | CGSpace814922025-12-08T10:29:22Z Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils Ghuman, B.S. Lal, R. sandy soils thermal properties water content thermal diffusivity thermal capacity seed germination seedling emergence Thermal conductivity increased with increasing soil water content. Clayey soils had lower thermal conductivity than sandy soils at all water levels studied. Thermal conductivity ranged from 0.37 to 1.42 for sandy loam, from 0.37 to 1.90 for loam, from 0.38 to 1.71 for sandy clay loam, and from 0.39 to 0.41 mcal/s [middle dot] cm [degrees]C for clay soils at water contents from 0.02 to 0.16 cm3 cm-3. Thermal conductivity differences among soils were smaller at lower soil water contents than at higher water contents. Thermal conductivity did not continuously increase with water content for the washed sand. Soil containing gravel had lower thermal conductivity than gravel-free soil. Thermal conductivity for a gravelly soil measured in situ was appreciably lower than that of the sieved and homogeneous laboratory soil columns. Thermal diffusivity of sandy or loamy soils increased with water content to the peak and then decreased with further increase in water content. Soils of fine texture, however, did not exhibit a distinct thermal diffusivity peak. Volumetric heat capacity calculated from measured values of thermal conductivity and diffusivity agreed closely with those estimated from volume fractions of soil components (by the de Vries equation) for coarse- to medium-textured soils, but not for fine-textured soils. At air-dry wetness, clayey soils generally had higher thermal capacity than sandy soils. 1985-01 2017-06-08T12:10:11Z 2017-06-08T12:10:11Z Journal Article https://hdl.handle.net/10568/81492 en Limited Access Ovid Technologies Ghuman, B.S. & Lal, R. (1985). Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils. Soil Science, 139(1), 74-80. |
| spellingShingle | sandy soils thermal properties water content thermal diffusivity thermal capacity seed germination seedling emergence Ghuman, B.S. Lal, R. Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils |
| title | Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils |
| title_full | Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils |
| title_fullStr | Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils |
| title_full_unstemmed | Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils |
| title_short | Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils |
| title_sort | thermal conductivity thermal diffusivity and thermal capacity of some nigerian soils |
| topic | sandy soils thermal properties water content thermal diffusivity thermal capacity seed germination seedling emergence |
| url | https://hdl.handle.net/10568/81492 |
| work_keys_str_mv | AT ghumanbs thermalconductivitythermaldiffusivityandthermalcapacityofsomenigeriansoils AT lalr thermalconductivitythermaldiffusivityandthermalcapacityofsomenigeriansoils |