عنوان مقاله [English]
نویسندگان [English]چکیده [English]
For evaluation of efficiency and yield per surface unit with using the 56 sugar beet producer countries data in year 2005 an econometric model based on COLS method has presented. With this model maximum sugar beet production efficiencies considering the harvested area and annual rainfall measure and level of mechanization has been determined. In total Iran with production efficiency 0.43 is in rank 22 of the world and France with production efficiency 1 has the maximum sugar beet production efficiency in the world. In continuance of discussion relation between the countries sugar beet harvest area, annual rainfall measure and level of mechanization with their efficiency and yield in sugar beet production has tried to be studied.