Economical analysis and relation between energy inputs and yield of greenhouse cucumber production in Iran

Mohammadi, Ali; Omid, Mahmoud

doi:10.1016/j.apenergy.2009.07.021

Cited by 275 publications

(131 citation statements)

References 20 publications

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“…Similar issues with low efficiency energy consumption in production of various crops in developing countries, including Iran, have previously been reported (e.g. Canakci & Akinici, 2006;Ozkan et al, 2007;Mohammadi & Omid, 2010). However, new policies by the Iranian government aim to gradually eliminate subsidization of fossil fuels which may put pressure on growers to implement more energy efficient practices.…”

Section: Energy Balancementioning

confidence: 90%

“…Because of using Cobb-Douglas function in the estimation, the coefficient of variables in log form can be regarded as elasticity (Mohammadi & Omid, 2010). For the data used in this study presence of autocorrelation in the residuals from the regression analysis was tested using the Durbin-Watson statistic test (Singh et al, 1997;Pishgar Komleh et al, 2011).…”

Section: Econometric Model Estimation Of Energy Inputs For Pistachio mentioning

confidence: 99%

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Energy inputs-yield relationship and sensitivity analysis of pistachio (Pistacia vera L.) production in Markazi Region of Iran

Afshar

Alipour

Hashemi

et al. 2013

Span. j. agric. res.

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Pistachio is considered as an important agricultural commodity in Iran and ranks top amongst all exported agricultural products. Conducting an overall energy audit and economic analysis of pistachio production can provide useful information to help implement management strategies for improving energy efficiency. A study was conducted during 2009 and 2010 to evaluate the overall energy inputs and outputs and to perform an economic analysis of pistachio production in the Iranian province of Markazi. The results revealed that the total energy input for pistachio production was 54305 MJ ha -1 . Electricity, followed by diesel fuel and nitrogen fertilizer application were the highest contributors to energy input in pistachio orchards. The contribution of direct energy was higher than indirect energy and share of non-renewable energy was more than renewable energy. Net energy, energy use efficiency, energy productivity and specific energy were 7522 MJ ha -1 , 0.86, 0.08 kg MJ -1 and 13.69 MJ kg -1 , respectively. Econometric model based on Cobb-Douglas function indicated that impacts of electricity, diesel fuel and chemical fertilizer energy inputs on pistachio yield were positive while the impact of machinery was negative. The marginal physical productivity (MPP) value for diesel fuel was the highest among other variables, followed by energy inputs related to the chemicals and irrigation water. The results revealed that production of pistachios in Markazi Province, under current management practices, are not energy efficient and efforts should be made to improve energy use efficiency.Additional key words: econometric model; energy use efficiency; renewable energy; sustainability.

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Section: Energy Balancementioning

confidence: 90%

Section: Econometric Model Estimation Of Energy Inputs For Pistachio mentioning

confidence: 99%

Energy inputs-yield relationship and sensitivity analysis of pistachio (Pistacia vera L.) production in Markazi Region of Iran

Afshar

Alipour

Hashemi

et al. 2013

Span. j. agric. res.

View full text Add to dashboard Cite

show abstract

“…Energy use efficiency (energy ratio), energy productivity, water productivity, specific energy (Khan, Singh 1996;Mandal et al 2002;Khan et al 2004;Yilmaz et al 2005), and net energy were calculated, as they are shown in Eqs 1-5 (Singh et al 1997;Mandal et al 2002;Mohammadi, Omid 2010). …”

Section: Energy Indicesmentioning

confidence: 99%

Study and determination of energy consumption to produce conventional rice of the Guilan province

Alipour¹,

Veisi²,

Darijani³

et al. 2012

Res. Agric. Eng.

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Alipour A., Veisi H., Darijani F., Mirbagheri B., Behbahani A.G., 2012. Study and determination of energy consumption to produce conventional rice of the Guilan province. Res. Agr. Eng., 58: 99-106.The aim of this study was to determine the energy efficiency indices in the agro-ecosystems of the Guilan province in 2010. One hundred and twenty-seven farmers were interviewed using a particularly designed questionnaire. The inputs in the calculation of energy use in agro-ecosystems embraced labour, machinery, electricity, diesel oil, fertilizers, seeds, while rice and straw yield were included in the output. The results depicted that total input and output energy into these agro-ecosystems were about 47,604 and 90,680.04 MJ/ha, respectively. The highest energy input was related to water (38.84%), electricity (27.87%) and nitrogen fertilizer (17.5%). Energy efficiency and energy productivity in these agro-ecosystems was 2.19 and 0.064 kg/MJ, respectively, and water productivity was 0.11 kg/m 3 . The results also showed that due to application of flood irrigation in these agro-ecosystems and also water elicited from subterranean sources by electrical pump, the inputs had the largest portion among the energy inputs to agro-ecosystems that this matter increased energy use in the unit area and also reduced energy efficiency and productivity.

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“…An analysis of input-output of energy is used in determining the effects of production on the use of energy in various crops. Many researchers studied energy and economic analysis to determine the energy efficiency of plant production, such as sugarcane in Morocco (Mrini et al 2001), soybean, maize and wheat in Italy (Sartori et al 2005), wheat, maize, sorghum in USA (Franzluebbers, Francis 1995), apple in Iran , cucumber in Iran (Mohammadi, Omid 2010), kiwifruit production in Iran , onion in Pennsylvania (Moore 2010) and coriander, lettuce, radish and spinach in Colombia (Bojaca, Schrevens 2010). However, little study was encountered on the efficiency of energy use in tomato production and optimization of energy inputs.…”

mentioning

confidence: 99%

Assessment of energy use pattern for tomato production in Iran: A case study from the Marand region

Jadidi¹,

Sabuni²,

Homayounifar³

et al. 2012

Res. Agric. Eng.

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Jadidi M.R., Sabuni M.S., Homayounifar M., Mohammadi A., 2012. Assessment of energy use pattern for tomato production in Iran: A case study from the Marand region. Res. Agr. Eng., 58: 50-56.The aim of the contribution was to determine energy consumption of input and output used in tomato production and to optimize the energy inputs in the Marand region, Iran. The study also sought to analyse the effect of farm size on energy use and input costs based on tomatoes production and to reveal the relationship between energy inputs and yield by developing mathematical models. Questions about energy management present very interesting and actual topic in this time. The results revealed that tomato production consumed a total of 65,238.9 MJ/ha of which fertilizers were 50.98% followed by water for irrigation (20.67%). Output-input energy and energy productivity were found to be 0.59 and 0.74 kg/MJ, respectively. The results of energy optimization showed that using existing energy inputs, the yield of tomato can be increased by 45.2% in small farms, 43.5% in medium farms and 30% in large farms. The rate of direct, indirect, renewable and non-renewable energy forms were found to be 37.2, 62.8, 30.9 and 69.1% of total energy input, respectively. The main non-renewable inputs were chemical fertilizers and diesel fuel, management of plant nutrients and proper machinery selection to reduce diesel fuel use would increase rate of renewable energy.

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Economical analysis and relation between energy inputs and yield of greenhouse cucumber production in Iran

Cited by 275 publications

References 20 publications

Energy inputs-yield relationship and sensitivity analysis of pistachio (Pistacia vera L.) production in Markazi Region of Iran

Energy inputs-yield relationship and sensitivity analysis of pistachio (Pistacia vera L.) production in Markazi Region of Iran

Study and determination of energy consumption to produce conventional rice of the Guilan province

Assessment of energy use pattern for tomato production in Iran: A case study from the Marand region

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