A model for fossil energy use in Danish agriculture used to compare organic and conventional farming

Dalgaard, Tommy; Halberg, Niels; Porter, John R.

doi:10.1016/s0167-8809(00)00297-8

Cited by 370 publications

(224 citation statements)

References 21 publications

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“…In most LCA/CF studies, farm energy use is modeled and a critical review of the accuracy of input data is important. In a Danish study, which measured actual diesel fuel use on commercial farms to validate a farm energy model, Dalgaard et al (2001) found a systematic underestimate of energy used for transportation and handling of roughage crops and manure in present models of livestock farms.…”

Section: Deforestationmentioning

confidence: 90%

An LCA researcher's wish list – data and emission models needed to improve LCA studies of animal production

Cederberg

Henriksson

Berglund

2013

Animal

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The last decade has seen an increase in environmental systems analysis of livestock production, resulting in a significant number of studies with a holistic approach often based on life-cycle assessment (LCA) methodology. The growing public interest in global warming has added to this development; guidelines for carbon footprint (CF) accounting have been developed, including for greenhouse gas (GHG) accounting of animal products. Here we give an overview of methods for estimating GHG emissions, with emphasis on nitrous oxide, methane and carbon from land use change, presently used in LCA/CF studies of animal products. We discuss where methods and data availability for GHGs and nitrogen (N) compounds most urgently need to be improved in order to produce more accurate environmental assessments of livestock production. We conclude that the top priority is to improve models for N fluxes and emissions from soils and to implement soil carbon change models in LCA/CF studies of animal products. We also point at the need for more farm data and studies measuring emissions from soils, manure and livestock in developing countries.

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Section: Deforestationmentioning

confidence: 90%

An LCA researcher's wish list – data and emission models needed to improve LCA studies of animal production

Cederberg

Henriksson

Berglund

2013

Animal

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“…In a recent review of almost 300 studies comparing yields of organic/agroecological and conventional agriculture throughout the world, it was found that, on average, organic and agroecological systems produce as much, if not more, than conventional systems (72), corroborating many other studies (73)(74)(75)(76)(77). Furthermore, it has now been well-established that energy efficiency in traditional and many organic systems is higher than in high-industrial/conventional agriculture (78)(79)(80)(81).…”

Section: Convergence Of Food Production With Nature Conservationmentioning

confidence: 99%

The agroecological matrix as alternative to the land-sparing/agriculture intensification model

Perfecto

Vandermeer²

2010

Proc. Natl. Acad. Sci. U.S.A.

570

392

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Among the myriad complications involved in the current food crisis, the relationship between agriculture and the rest of nature is one of the most important yet remains only incompletely analyzed. Particularly in tropical areas, agriculture is frequently seen as the antithesis of the natural world, where the problem is framed as one of minimizing land devoted to agriculture so as to devote more to conservation of biodiversity and other ecosystem services. In particular, the "forest transition model" projects an overly optimistic vision of a future where increased agricultural intensification (to produce more per hectare) and/or increased rural-to-urban migration (to reduce the rural population that cuts forest for agriculture) suggests a near future of much tropical aforestation and higher agricultural production. Reviewing recent developments in ecological theory (showing the importance of migration between fragments and local extinction rates) coupled with empirical evidence, we argue that there is little to suggest that the forest transition model is useful for tropical areas, at least under current sociopolitical structures. A model that incorporates the agricultural matrix as an integral component of conservation programs is proposed. Furthermore, we suggest that this model will be most successful within a framework of small-scale agroecological production.food crisis | biodiversity | fragmented landscapes | matrix quality | smallscale farmers

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“…However, intensive use of energy causes problems threatening public health and environment. Efficient use of energy in agriculture will minimize environmental problems, prevent destruction of natural resources, and promote sustainable agriculture as an economical production system (Dalgaard et al 2001).…”

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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A model for fossil energy use in Danish agriculture used to compare organic and conventional farming

Cited by 370 publications

References 21 publications

An LCA researcher's wish list – data and emission models needed to improve LCA studies of animal production

An LCA researcher's wish list – data and emission models needed to improve LCA studies of animal production

The agroecological matrix as alternative to the land-sparing/agriculture intensification model

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

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