Sustainable agriculture is a holistic approach to producing food, fiber, feed and fuel in a way that does not damage the environment and also must meet the needs of present and future population of the worlds, while considering agro-ecosystem health, social and economic equity and profitability. Therefore in each country or region the sustainable agriculture cannot be isolated from the concept of sustainable development. In order to study the sustainability of agricultural systems in Golestan province in the north of Iran during the period of 2002-2011, the current survey was conducted. The required data and information obtained from formal statistical database. For each year the total numerical value of sustainability calculated using 21 different indexes. Because of different nature of selected indexes and also wide range of them, in order to facilitate comparison all of the calculated indexes normalized. Based on results during the studied period the agricultural sustainability increased significantly. The lowest value of sustainability observed in the first year of study (i.e. 2002) but the highest value for sustainability calculated for 2009 and thereafter sustainability of agro-ecosystem decreased slightly. The main reasons for improvement of sustainability was decreasing the usage of chemical inputs such as fertilizers and pesticides and increasing resources use efficiency, crop yield, the cultivation area of nitrogen fixing plants and also increasing the net economical profits, during the recent years.
