Abstract: The numerical model coupling soil moisture and thermal transfer of the crop field was consisted of the soil unbalanced thermodynamics equation,the one-dimensional unsaturated water flow equation through homogeneous soil which was the sum of the non-isothermal model in the bare soil and the water-uptake-by-root function.Associated with the initial and boundary conditions,Newton-Naphson iterative technique adopted,the numerical model was computed,while the variables and the parameters of the function were confirmed.The results showed that the simulated values were very close to the measurements.As the soil layer increased,the accuracy of simulative results would be improved.

Key words: Soil moisture, Soil moisture, Soil temperature, Maize, Numerical model coupling soil moisture and thermal transfer