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标题：Energy efficiency and cost analysis of canola production in different farm sizes
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作者：S. H. Mousavi-Avval ; S. Rafiee ; A. Jafari 等
期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2011
卷号：2
期号：5
页码：845-852
出版社：International Energy and Environment Foundation (IEEF)
摘要：Efficient use of energy in agriculture is one of the conditions for sustainable agricultural production. The aims of this study were to determine the amount of input–output energy used in canola production, to investigate the efficiency of energy consumption and to make an economic analysis of canola production in different farm sizes. Data used in this study were obtained from 130 randomly selected farms in Golestan province, the most important centre of oilseed production in Iran. The surveyed farms were classified into three groups of small (less than 2 ha), medium (2 to 4 ha) and large farms (more than 4 ha). The results revealed that total energy input for canola production increased from 15817.24 MJ ha-1, in small farms, to 20663.13 MJ ha-1, in large farms; while, the highest yield value (2286.36 kg ha-1) was obtained from medium farms. The results also revealed that the medium farms had the highest energy use efficiency (3.75) and benefit to cost ratio (1.59); indicating a better management of energy and input consumptions in these farms. Moreover, the energy use efficiency for small and large farms was found to be 3.35 and 3.07, respectively.