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Agriculture seeks to accommodate the needs of quality, the cultivation of land in harmony with the environment, respecting the life and the balance of the ecosystems. In this context the aims of our work were to contribute to the strengthening of the aspects related to the influence of the rotation and fertilizing purposes with nitrogen on the content in nutrients of the soil, of the elements of the fertility and the production of triticum wheat. Also has proposed to achieve a summary report on the experiments of ...

The results of the electron temperature distribution modelling in the F region of the subauroral ionosphere for different helio-geomagnetic conditions are presented taking into account magnetospheric heat fluxes. The study has been carried out using the threedimensional model of the high-latitude ionosphere in Euler?s variables which taking into account its thermal regime. It is shown that during the period of low solar activity in winter solstice condition the displacement of poles leads to regular longitudinal f...