A comparison of energy use in conventional and organic olive oil production in Spain

Guzmán, Gloria I.; Alonso, Antonio Miñarro

doi:10.1016/j.agsy.2008.06.004

Cited by 128 publications

(50 citation statements)

References 23 publications

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“…Other variables are investigated in previous studies, including longitude and latitude, precipitation, temperature, humidity, amount of biomass, soil nutrition and acidification, irrigation, tillage, rainfall, intensity of farming, farm slope, and altitude (Kaltsas et al, 2007;Pimentel et al, 2005;Guzman and Alonso, 2008;Zentner et al, 2011;Moreno et al, 2011;Deike et al, 2008). However, these variables are not considered as they appear insufficient (1e15 times) in the 107 studies used for the meta-analysis.…”

Section: Environmental Effects Of Organic Farmingmentioning

confidence: 96%

Measuring the environmental effects of organic farming: A meta-analysis of structural variables in empirical research

Lee¹,

Choe

Park

2015

Journal of Environmental Management

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This study examined the structural variables affecting the environmental effects of organic farming compared to those of conventional farming. A meta-analysis based on 107 studies and 360 observations published from 1977 to 2012 compared energy efficiency (EE) and greenhouse gas emissions (GHGE) for organic and conventional farming. The meta-analysis systematically analyzed the results of earlier comparative studies and used logistic regression to identify the structural variables that contributed to differences in the effects of organic and conventional farming on the environment. The statistical evidence identified characteristics that differentiated the environmental effects of organic and conventional farming, which is controversial. The results indicated that data sources, sample size and product type significantly affected EE, whereas product type, cropping pattern and measurement unit significantly affected the GHGE of organic farming compared to conventional farming. Superior effects of organic farming on the environment were more likely to appear for larger samples, primary data rather than secondary data, monocropping rather than multicropping, and crops other than fruits and vegetables. The environmental effects of organic farming were not affected by the study period, geographic location, farm size, cropping pattern, or measurement method.

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Section: Environmental Effects Of Organic Farmingmentioning

confidence: 96%

Measuring the environmental effects of organic farming: A meta-analysis of structural variables in empirical research

Lee¹,

Choe

Park

2015

Journal of Environmental Management

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“…Losses through generation and transport of the electricity were estimated at 70%, thus 1 kWh is equivalent to 12.1 MJ [21]. Indirect energy for onfarm irrigation systems (pumping system, filters, pipelines and ponds) has been calculated following Batty and Keller's approach [26], although with an updated energy input conversion factor of raw materials.…”

Section: Energy Consumptionmentioning

confidence: 99%

Energy and greenhouse-gas emissions in irrigated agriculture of SE (southeast) Spain. Effects of alternative water supply scenarios

Martín-Górriz

Soto-García

Álvarez

2014

Energy

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“…Specific features of organic farming could further improve the contribution of fruit tree orchards to climate change mitigation. Reduced fossil energy consumption in organic orchards (Guzmán and Alonso 2008;Alonso and Guzmán 2010) suggests that there may also exist greenhouse gas emissions savings in these systems, taking into account the high importance of energy-related emissions in the carbon footprint of herbaceous Spanish cropping systems . At the soil level, evidence suggests low N 2 O emissions associated to organic fertilizers (Aguilera et al 2013b) and higher soil organic carbon (SOC) stocks in organically managed soils under Mediterranean climate (Aguilera et al 2013a).…”

Section: Introductionmentioning

confidence: 99%

Greenhouse gas emissions from conventional and organic cropping systems in Spain. II. Fruit tree orchards

Aguilera

Guzmán

Alonso

2014

Agron. Sustain. Dev.

137

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Fruit tree orchards have a historical and economic importance for Mediterranean agriculture, notably in Spain. Fruit tree orchards have the potential to mitigate global warming by sequestrating carbon (C) and providing renewable fuels. Actually, there is few information on the benefits of organic practices. Therefore, we analyzed the greenhouse gas contribution of 42 pairs of organic and conventional perennial cropping systems, including citrus, subtropical trees, other fruit trees, treenuts, vineyards, and olives, using life-cycle assessment (LCA). The assessment was based on management information from interviews and involved the estimation of soil carbon sequestration, specific Mediterranean N 2 O emission factors, and the consideration of coproducts. Results show on average a 56 % decrease of greenhouse gas emissions under organic versus conventional cropping, on an area basis. On a product basis, greenhouse gas emissions decreased by 39 % on average. These findings are explained mainly by C sequestration in soils, which is due in turn to higher C inputs by cover cropping and incorporation of pruning residues.

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A comparison of energy use in conventional and organic olive oil production in Spain

Cited by 128 publications

References 23 publications

Measuring the environmental effects of organic farming: A meta-analysis of structural variables in empirical research

Measuring the environmental effects of organic farming: A meta-analysis of structural variables in empirical research

Energy and greenhouse-gas emissions in irrigated agriculture of SE (southeast) Spain. Effects of alternative water supply scenarios

Greenhouse gas emissions from conventional and organic cropping systems in Spain. II. Fruit tree orchards

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