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| Registros recuperados: 683 | |
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| Musyoka, Martha W.; Adamtey, Noah; Muriuki, Anne W.; Bautze, David; Karanja, Edward N.; Mucheru-Muna, Monica; Fiaboe, Komi K.M.; Cadisch, Georg. |
| Organic farming has been proposed as a solution to foster agricultural sustainability and mitigate the negative environmental impacts of conventional farming. This study assessed N losses and soil surface N balances in conventional and organic farming systems in a sub-humid and semi-humid (Chuka and Thika) sites in Kenya. Nitrate–N (NO3−–N) leached was trapped at 1 m depth using the Self Integrating Accumulator core method and the changes in mineral-N were assessed at different soil depths and different crop growth stages. Both conventional and organic farming systems lost substantial amounts of NO3−–N at the early growth stages of all the crops. Cumulative NO3−–N leached was similar in all the farming systems in each cropping season. More NO3−–N was... |
| Tipo: Journal paper |
Palavras-chave: Air and water emissions; Africa. |
| Ano: 2019 |
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| Menzel, Friederike; Kiefer, Lukas; Over, Ralf; Bahrs, Enno. |
| Quantification and mitigation of greenhouse gas emissions is an intensively discussed topic. For dairy farms many studies consider a higher milk yield per cow for greenhouse gas mitigation but this often results in a reduction in herd fertility and thus more heifers are needed which may lead to more emissions in total. This paper presents the Product Carbon Footprint of 36 organic dairy farms and analyses the influence of milk yield per cow and longevity of dairy cows. Results are: (1) a product carbon footprint of 1,61 kg CO2eq/kg fat and protein corrected milk on average, (2) increasing milk yield per cow causes decreasing product carbon footprints (coefficient of determination 48 %) and (3) decreasing longevity per cow causes decreasing product carbon... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Air and water emissions. |
| Ano: 2015 |
URL: http://orgprints.org/26923/1/26923_menzel.pdf |
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| Kuestermann, B.; Huelsbergen, K.-J.. |
| In 81 commercial farms in Germany, emissions of the greenhouse gases CO2, CH4 and N2O from crop production have been computed by model-based analyses. The considered influence factors comprise farm structure, mass and energy inputs as well as cultivation methods. A linear correlation was found between energy input and greenhouse gas potential. Due to lower N and energy inputs and also higher C sequestration as a result of humus restoration, the organic farms revealed area-related emissions (785 kg CO2 eq ha-1 a-1) that were 2.75 times lower than the emissions from conventional farms (2165 kg CO2 eq ha-1 a-1). |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/12813/1/12813.pdf |
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| As a part of the Joint Actions on Climate Change conference held on June 9th and 10th 2009 in the Aalborg Congress & Culture Centre, Denmark, the Danish iPOPY group organized a workshop on “Food service at events as a strategy for sustainable food consumption.” The workshop was part of the Conference’s fourth Theme, Governance & Climate Mitigation. The workshop was held on June 10th from 11.30-13.00 as part of the iPOPY project (innovative Public Organic food Procurement for Youth). The iPOPY-project (2007-2010) is one out of eight transnational pilot projects funded by the CORE Organic funding body network within the context of the European Research Area. The papers and the PowerPoint presentations from the event are presented in this... |
| Tipo: Proceedings |
Palavras-chave: Environmental aspects; Food systems; Markets and trade; Air and water emissions. |
| Ano: 2010 |
URL: http://orgprints.org/16799/1/Joint_actions_in_core_FINAL100210.pdf |
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| Skinner, Colin; Buol, Amanda; Gattinger, Andreas; Fliessbach, Andreas; Mäder, Paul. |
| Soil management induces nitrous oxide (N2O) and methane (CH4) emissions that account for around 40% of agriculture's direct greenhouse gas (GHG) emissions globally. Nitrous oxide is formed in the soil through a multitude of aerobic and anaerobic microbial processes with broadly varying shares and rates depending on atmospheric and site-specific conditions. Generally, N2O fluxes show a high spatial and temporal variability. A robust finding is that lower nitrogen application rates are associated with lower nitrous oxide emissions. Organic farming systems provide multiple environmental benefits; they foster inter alia agriculture’s mitigation potential concerning climate change. Skinner et al. (2014) evaluated with Meta-Analysis the available global dataset... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions; Soil. |
| Ano: 2014 |
URL: http://orgprints.org/25754/1/Poster-BGS-Changings-improved-fin.pdf |
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| Kristensen, Hanne Lakkenborg; Campanelli, G.; Bavec, Franc; von Fragstein und Niemsdorff, Peter; Canali, S.; Tittarelli, F.. |
| Vegetables with a high nitrogen demand such as cauliflower may cause intensive leaching of nitrate to the environment in conventional as well as in organic production. In organic cropping systems, the use of an in-season living mulch may decrease the risk of nitrate leaching after harvest when left growing in the field to the end of the leaching season in spring. The aim of this study was to investigate the effect of growing an in-season living mulch including legumes on the risk of leaching of inorganic nitrogen over winter, and soil nitrogen availability the following spring. Three field experiments were carried out in Slovenia, Germany and Denmark in the frame of the Interveg project (CORE organic II). Evaluation of soil inorganic nitrogen content was... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Air and water emissions; Vegetables; Farm nutrient management. |
| Ano: 2014 |
URL: http://orgprints.org/23981/1/23981%20Kristensen%20et%20al_Effect%20of%20living%20mulch%20on%20N%20leaching%20in%20cauliflower_MM.pdf |
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| Yöni leaching field (owned by the MTT Agrifood Research Finland) is situated in south-western Finland (60° N 23° E). The soil type of the field is clay, with four percent of organic C in the plough layer. There are six plots, 0.5 hectares each. Two plots have been under organic farming since 1993, two plots are under conventional farming and two plots are under natural grassland. The volume of the water from drainage pipes of each plot is measured automatically and flow-weighted water samples are taken by hand. Surface runoff is conducted to the same measurement system so that the runoff represents the total runoff from the plots. There are four other plots under organic and four plots under conventional farming, but the drainage system does not allow the... |
| Tipo: Research facility description |
Palavras-chave: Air and water emissions. |
| Ano: 2023 |
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| Znaor, Darko; Bošnjaković, Branko. |
| Today, and especially in the years to come, agriculture, as well as all other human activities, will have to pay much more attention to their environmental impacts. In other words, it is expected that in the near future only technologies which care about environmental aspects will be promoted and accepted by policy makers, scientists, consumers, and society in general. This is not surprising since the environmental problems are among the most urgent ones our civilization will have to tackle and solve. This demand for more careful stewardship of environment is also acknowledged by philosophy of sustainable development - a widely recognized concept and necessity of future development. Although established at the very beginning of this century, ecological... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general; Farming Systems; Nutrient turnover; Social aspects; Air and water emissions; Soil; Biodiversity and ecosystem services; Food systems; Policy environments and social economy; Environmental aspects. |
| Ano: 1996 |
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| Carter, Mette S.; Sørensen, Peter; Petersen, Søren O.; Ambus, Per. |
| Organic arable farming faces challenges with low crop yields, partly due to inefficient use of green manure-derived nitrogen (N). Under current farming practices, green manure leys are often cut and mulched during the growing season with the associated risk of environmental N losses, leading to eutrophication and global warming. In this 3-month incubation experiment, we tested a new green manure management strategy as part of the ICROFS project HighCrop. With the new strategy, green manure leys are instead harvested and preserved until the following spring either as compost mixed with straw (grass-clover:straw, 4:1, w:w) or as silage of harvested ley biomass. In spring, these two green manure materials can then be used for targeted fertilization of spring... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Air and water emissions. |
| Ano: 2013 |
URL: http://orgprints.org/25941/19/25941a.pdf |
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| Hansen, Sissel; Bakke, Haavik, Torleiv; Bergslid, Ildri (Rose) Kristine; Elvatun, Helena; van Gool, Bart; Lunnan, Tor; Røthe, Gunnhild; Walland, Finn. |
| I denne rapporten presenterer vi seks gårder som viser at det er mulig å forene god økonomi med en miljømessig bærekraftig produksjon, men økonomien var best på de største gårdene. Felles for alle gårdene er næringsrik jord med god jordstruktur og god drenering, fokus på agronomi og godt husdyrstell. Dette resulterte i gode avlinger, god utnytting av tilførte næringsstoff, moderat bruk av energi og moderate utslipp av klimagasser. Fra observasjoner på disse gårdene og diskusjon på arbeidsseminar med gårdbrukerne, prosjektgruppe og inviterte gjester kan vi tipse om noen tiltak for miljøvennlig melkeproduksjon: god drenering, lite kjøring på våt jord, utføre jordarbeiding, gjødsling og høsting straks været og jorda er egnet, slepeslange med stripespreder i... |
| Tipo: Report |
Palavras-chave: Production systems; Dairy cattle; Farming Systems; Animal husbandry; Air and water emissions; Farm nutrient management. |
| Ano: 2018 |
URL: http://orgprints.org/33980/1/NIBIO_RAPPORT_2018_4_96.pdf |
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| Thorup-Kristensen, K.. |
| An experiment was performed to study the significance of rooting depth of four vegetable crops on their utilization of green manure nitrogen (N). Rates of rooting depth development were estimated as approximately 0.2, 0.7, 1.2 and 1.2 mm day C)1 for onion, carrot, lettuce and cabbage, respectively. At harvest, onion and lettuce were found to be shallow-rooted with final rooting depths of only 0.3 and 0.6 m, respectively, whereas carrot and cabbage reached rooting depths of at least 1.1 m. The two deep-rooted vegetables increased their N uptake by 46, 24 and 7 kg N ha)1 when following winterhardy legumes, non-hardy legumes and rye, respectively; the equivalent responses by the two shallowrooted crops were 23, 9 and 15 kg N ha)1, respectively. Thus the... |
| Tipo: Journal paper |
Palavras-chave: Root crops; Vegetables; Air and water emissions; Composting and manuring. |
| Ano: 2006 |
URL: http://orgprints.org/7903/1/7903.pdf |
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| Many farming practices used in organic farming reduce the risk of nutrient losses to environment, especially the absence of inorganic fertilizer inputs, which decreases the leaching risk of nitrogen (N) and phosphorus (P). However, frequent use of animal manure and leguminous crops may induce excessive release of nitrate N in soil during periods when the uptake of N by crop is low. The lower yield level obtained in organic farming compared with conventional farming may further reduce the beneficial environmental impacts, if they are calculated per yield instead of per hectare. In Finland, the area under organic farming increased rapidly in the 1990's from 1.1% (1994) to 7.1% (2002). Despite the large support given to organic farming there has been no... |
| Tipo: Project description |
Palavras-chave: Air and water emissions. |
| Ano: 2023 |
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| Casey, J. W.; Holden, N.M.. |
| The problems of overproduction within the European Union countries and the environmental impact of agriculture have lead to the introduction of schemes that aim to reduce both. Beef (Bos taurus) production forms a large component of the Irish agricultural industry and accounts for more than one quarter of agricultural economic output. Recently, the European CAP (Common Agricultural Policy) has been re-evaluated to include supplementary measures that encompass the environmental role of agriculture rather than just the production role. A life cycle assessment (LCA) method was adopted to estimate emissions per kilogram of CO2 equivalent per kilogram of live weight (LW) leaving the farm gate per annum (kg CO2 kg−1 LW yr−1) and per hectare (kg CO2 ha−1 yr−1).... |
| Tipo: Journal paper |
Palavras-chave: Beef cattle; Air and water emissions; Environmental aspects. |
| Ano: 2006 |
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| Registros recuperados: 683 | |
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