Modeling and sensitivity analysis of energy inputs for apple production in Iran

Rafiee, Shahin; Avval, Seyed Hashem Mousavi; Mohammadi, Ali

doi:10.1016/j.energy.2010.04.015

Cited by 261 publications

(93 citation statements)

References 26 publications

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“…Data were collected from the growers by using a face-to-face questionnaire in March to April 2009. Random sampling of farms was done within whole population and the size of each sample was determined using Equation (1) derived from Neyman method (Ozkan et al, 2004) Inputs in apple production in Iran are human labour, machinery, diesel fuel, inorganic fertilisers, manure, pesticides and irrigation water (Rafiee et al, 2010). Outputs are apple fruits.…”

Section: Methodsmentioning

confidence: 99%

Energy use in apple production in the Esfahan province of Iran

Sami¹,

Shiekhdavoodi²,

Asakereh³

2011

African Crop Science Journal

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Energy is a fundamental ingredient in the process of economic development, as it provides essential services that maintain economic activity and the quality of human life. Modern agriculture has become very energy-intensive. The aim of this study was to evaluate energy use in apple production in the Esfahan Province in Iran. Data used in this study were obtained from 146 farmers using a face to face interview method. The total energy requirement under apple farming was 36,135.16 MJ ha -1 , whereas 46.2, 25 and 15.8% was consumed due to chemicals, fuel and manure fertiliser, respectively. Renewable energy was 23.6% of total energy input. The input-output ratio, productivities, specific and net energy gain were 1.17, 0.49 kg MJ , respectively. Apple production needs to improve the efficiency of energy consumption and to employ renewable energy.Key Words: Energy intensive, energy ratio, renewable energy RÉSUMÉ L'énergie est un ingrédient fondamental dans le processus de développement économique, étant donné qu'elle fournit de services essentiels pour le maintien des activités économiques et la qualité de vie humaine. L'agriculture moderne est devenue trop exigente en énergie. L'objet de cette étude était d'évaluer l'usage de l'énergie dans la production de la pomme dans la Province d' Esfahan en Iran. Les données utilisées dans cette étude étaient obtenues de 146 fermiers par la méthode d'interview face à face. Le total des besoins en énergie pour la production de la pomme était de 36,135.16

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Section: Methodsmentioning

confidence: 99%

Energy use in apple production in the Esfahan province of Iran

Sami¹,

Shiekhdavoodi²,

Asakereh³

2011

African Crop Science Journal

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“…In this province, energy inputs for the paddy production were irrigation water, seed, human labor, diesel fuel, machinery, pesticides, and fertilizers; while energy outputs were paddy and straw. It must be noted that solar energy, either as radiation or as heat, was not taken into account, as it is considered a free subsidy in the energetic or economic analysis of agricultural systems (Tabar et al 2010;Rafiee et al 2010;). The energy equivalent of inputs and outputs, shown in Table 2, was used to estimate the energy values.…”

Section: Energy Analysismentioning

confidence: 99%

“…Despite many attempts to specify the energy use efficiency in different agro-ecosystems (Bockari-Gevao et al 2005;Kazemi et al 2015;Keshavarz Afshar et al 2013;NabaviPelesaraei et al 2014;Pishgar-Komleh et al 2011;Rafiee et al 2010), the gap of gender perspective in this kind of analysis has not been filled yet. This ignorance happened while the role of women in crop production has been considered as the foundation of studies regarding women's participation in the development process since 1970s (e.g., Barrientos et al 2005;Birah et al 2016;Carr 2005;Egharevba and Iweze 2004;Jha 2004;Kerr et al 2007;Lope-Alzina 2007).…”

Section: Introductionmentioning

confidence: 99%

Embedding gender factor in energy input–output analysis of paddy production systems in Mazandaran Province, Iran

Bisheh

Veisi

Liaghati

et al. 2017

Energ. Ecol. Environ.

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This study explores gender in the energy inputoutput analysis by comparing the energy indicators in paddy production in female-headed farms and male-headed farms during years of 2014-2015 in Mazandaran Province. Questionnaires were used to collect data from 120 paddy farmers (60 males and 60 females). Energy indicators were calculated for female-and male-headed farms. Results revealed noticeable variations in some important energy indicators between female-and male-headed farms. A significant difference was observed in terms of total energy input. The majority of energy input consumption for both female-and male-headed farms was devoted to diesel fuel, fertilizers, especially nitrogen fertilizers, and machinery. Results indicated that there was no significant difference between male-headed and female-headed farms in terms of net energy and specific energy, but energy use efficiency and energy productivity were significantly higher for female-headed farms. Then, it can be argued that gender factor had a significant impact on amount of direct, indirect, and renewable energy inputs. Based on our findings, female-headed rice systems were more efficient, where fossil-based inputs were used more environment friendly than male-headed farms. Finally, targeted ''soft'' policies like gender-sensitive capacity-developing program were proposed.

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“…The MPP of the various inputs was calculated using the j of the various energy inputs as follows (Singh et al, 2004;Rafiee et al, 2010):…”

Section: Sensitivity Analysismentioning

confidence: 99%

“…Singh et al (2004) and Rafiee et al (2010) investigated energy inputs and crop yield relationship to develop an econometric model for wheat and apple productions, respectively. Moreover, they applied the marginal physical productivity (MPP) technique to analyze the sensitivity of energy inputs on yield.…”

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confidence: 99%