Modeling Soil Heat Flux in R

Huzsvai, László and Szőke, Szilvia (2014) Modeling Soil Heat Flux in R. AGRÁRINFORMATIKA / JOURNAL OF AGRICULTURAL INFORMATICS, 5 (1). pp. 37-45. ISSN 2061-862X

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Abstract

Knowing of soil heat flow properties of a crop field inform the farmer about temperature conditions of seeds germination. Soil heat flow is either measured or modeled. In our study we rely on the procedure developed by Sang-Ok Chung and Robert Horton (1987). With the R language version of their heat flux model we studied on data collected by Gábor Szász (director of the Agro-meteorological Observatory of Debrecen in May 2001.). Soil temperature data were collected in 5, 25 and 50 cm depths in 15 minute intervals from a loam texture chernozem soil covered with short grass. The upper boundary layer at 5 cm and the lower boundary at 50 cm soil temperature data contain 2976 time periods. Using the R programmed heat flux model the 25 cm depth soil temperatures were simulated and compared to the measured ones. Since the simulated and measured soil temperatures differed significantly we assumed necessity of coupling heat and moisture flux for describing time change of soil temperate.

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