In:
Yüzüncü Yıl Üniversitesi Tarım Bilimleri Dergisi, Yuzuncu Yil Universitesi Tarim Bilimleri Dergisi, Vol. 29, No. 1 ( 2019-03-29), p. 1-9
Abstract:
Distribution of temperature waves at soil
surface and subsurface layers depends on thermal properties (soil heat capacity, diffusivity and conductivity etc.) and surface heat flow, as well as
basic soil properties. In this study, (i) change in soil surface temperature was examined according to solution of heat conductivity equation and Fourier
law in case of constant heat flow on soil surface, and (ii) surface heat flow of soil was described analytically as a function of surface and sublayers
temperatures, heat diffusivity and time. During the experimental period, mean soil temperature at the surface and 10 cm depth varied between 18.5 °C and 33.1 °C, where the mean thermal
diffusivity coefficient (a) in this layer was sec-1.. The mean of
specific and volumetric heat capacities of dry soil were (or ) and , respectively. Soil volumetric moisture content ,
volumetric heat capacity associated with moisture content, thermal conductivity were , (or ) and , respectively.
The heat flow at the soil surface varied between 25.638 and 239.742changing
from surface to deeper soil layers during 09.00-15.00 hours, whereas during 15.00-17.00 hours heat flow varied between -27.725 and -12.473changing
from lower to upper soil layers. Mean relative errors between measured and predicted soil surface temperature values were
7.10%. Predicting surface temperature changes of soils mathematically, and determination of numerical values of thermal properties is one of the necessary
stages for modelling soil temperature, and important for monitoring the effect of soil management on soil temperature in both humid and arid regions with
consideration of climate change.
Type of Medium:
Online Resource
ISSN:
1308-7576
DOI:
10.29133/yyutbd.426847
Language:
Unknown
Publisher:
Yuzuncu Yil Universitesi Tarim Bilimleri Dergisi
Publication Date:
2019
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