Journal of Agricultural Technology 2014, Vol. 10(3): 517-532 517 Modeling and analysis of energy efficiency in grape production of Iran Mousa Rasouli 1 , Majid Namdari 2, 3* , Seyed Hashem Mousavi-Avval 2, 3 1 Department of Landscape Engineering, Faculty of Agriculture, Malayer University, Malayer, Iran, 2 Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran, 3 Young Researchers and Elite Club, Karaj Baranch, Islamic Azad University, Karaj, Iran Mousa Rasouli, Majid Namdari, Seyed Hashem Mousavi-Avval (2014) Modeling and analysis of energy efficiency in grape production of Iran. Journal of Agricultural Technology 10(3):517- 532. This paper examines the energy use patterns and energy input-output analysis of grape productions in Iran. For this purposes, a face to face questionnaire with 48 grape growers from Hamadan province, Iran was conducted. The results indicated that total energy inputs were 33873.78 MJ ha -1 . The energy use efficiency, energy productivity and net energy of grape production were found to be 1.73, 0.15 kg MJ -1 and 24748.62 MJ ha -1 . Among input energy sources, chemical fertilizers and electricity contained highest energy with 51.64 and 23.95%, respectively. Econometric model evaluation showed that, the impact of human labor for grape was significant at 1% level. The results also showed that, direct, indirect and renewable and non-renewable, energy forms had a positive and statistically significant impact on output level. Also, the marginal physical productivity (MPP) technique was applied to analyze the sensitivity of energy inputs. It was found that, grape production had more sensitivity on chemicals, electricity and water for irrigation energies; so that an additional use of 1 MJ from each of the chemicals, electricity and water for irrigation would lead to an increase in production by 5.68, 2.42 and 1.81 kg, respectively. Keywords: Energy input; Econometric model; Grape; Sensitivity analysis. Introduction Grapevine (Vitisvinifera L.) is one of the oldest crops and the only Mediterranean/Western Asiatic representative of the Vitis genus. Its domestication created cultivars suited to a wide diversity of climates and tastes. Iran is very rich in grapevine biodiversity and different cultivars cultivated in more than 20 provinces. Qazvin, West-Azerbaijan, Fars, Khorasan and Hamedan provinces are the main centers of grape production in Iran, where it grows on flat and slopping areas (Rasouli et al., 2012). * Corresponding author: Majid Namdari; e-mail: majidnamdari@ut.ac.ir Journal of Agricultural Technology 2014 Vol. 10(3): 517-532 Available online http://www.ijat-aatsea.com ISSN 1686-9141