Research Information System
Actual Problems of Economics, vol.140, no.2, pp.188-197, 2013 (SCI-Expanded)
This study was conducted to determine the energy balance between energy inputs and yield for walnut production in Turkey. For this purpose the data were collected from 51 walnut orchards. The following results were obtained from this study: Total energy input of 42,092.86 MJ ha-1 was required for walnut production. The share of chemical fertilizers by 46.70% of the total energy inputs was the highest energy input. This was followed by diesel-fuel (19.97%) and pesticides (15.83%), respectively. The energy efficiency, energy productivity, specific energy, and net energy were found as 1.74, 0.11 kg MJ-1, 9.25 MJ kg-1 and 31,069.04 MJ ha-1, respectively. The results of econometric model estimation revealed that the impacts of human labor, pesticides, chemical fertilizers, diesel-fuel and water for irrigation energy inputs were significantly positive on yield. The results of sensitivity analysis of the energy inputs showed that the MPP value of human labor was the highest, followed by water for irrigation and diesel-fuel energy inputs, respectively. © Erdemir Gundogmus, 2013.