The purpose of this study was to explain analysis of major crop production systems in Kermanshah province of Iran. Data were collected from 180 farms in Kermanshah province using a face to face questionnaire performed in 2011. Farms were selected based on random sampling method. Economic analysis was carried out by taking various cost components into consideration, including production costs and the total production value for wheat, maize and alfalfa production systems in a year production life. The result show that total production cost for wheat, maize and alfalfa production systems were about 845.95, 893.86 and 994.70 $ha-1. The highest share of total cost in wheat and alfalfa production systems were diesel and machinery costs and in maize production systems chemical input cost was highest shear. Also, net return for wheat, maize and alfalfa production systems were about 1534.05, 1676.54 and 4138.51 $ha-1. Accordingly, in Kermanshah province the high benefit/cost ratio and productivity was in alfalfa production systems.
Key words: Economic analysis, production costs, net return, benefit/cost ratio, productivity.