The models of a thermal mode of ground and long-wave of radiation are considered. The value coming long-wave of radiation participates in a boundary condition, which provides join of the solutions of tasks in ground and in surface layer of air. An atmosphere and ground are broken into layers at numerical realization of models. Temperature on a surface of ground calculates off through coming radiation, then there is a distribution of temperature on a soil structure. The estimation of results of numerical accounts is resulted.