Introduction:Between different factors, atmosphere conditions are most important natural factors which affect the agricultural crops production. One can observe these effects as frost, sunstroke, outbreak of pest and etc. At the moment, agriculture is one of the most important sections in the economy of a country. In fact, one can say that economic growth is impossible without agriculture. Agricultural crops growth is widely dependent to the atmosphere conditions. Light, temperature, co2, water and nutrients are controlled by the atmosphere. Cultivation of crops in sites with compatible conditions for them has two results.