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DCA Newsletter AU: Intensiv grøntsagsproduktion på plantebaseret gødning Organic Eprints
Kristensen, Hanne Lakkenborg.
Description of the DoubleCrop project and its wider perspectives.
Tipo: Web product Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Root crops.
Ano: 2018 URL: http://orgprints.org/35458/3/index.html
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De l’eau propre dans le Lac de Zoug? 25 pourcents de fermes bio! Organic Eprints
Schmid, Otto.
Des tapis d’algues puantes et des poissons morts avaient cho-qué il y a trente ans la population du lac de Zoug. Le canton avait réagi avec un projet à millions: un gigantesque système de tuyaux qui devait nettoyer le lac de Zoug avec de l’eau du lac des Quatre Cantons. Des pionniers bio ont trouvé que c’était se limiter à lutter contre les symptômes et ont montré en 1987 dans une grande étude du FiBL ce que la reconversion de tout le canton à l’agriculture biologique aurait comme conséquences.
Tipo: Newspaper or magazine article Palavras-chave: "Organics" in general; Air and water emissions; Biodiversity and ecosystem services.
Ano: 2017 URL: http://orgprints.org/32211/1/Bioactualites_8_2017_O.Schmid.pdf
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Décomposition anaérobie – peut-elle protéger le climat? Organic Eprints
Hämmerli, Franziska.
Un agriculteur fait de bonnes expériences avec un processus de décomposition sensé séquestrer beaucoup de carbone dans le sol. Les chercheurs sont sceptiques.
Tipo: Newspaper or magazine article Palavras-chave: Composting and manuring; Air and water emissions; Soil.
Ano: 2018 URL: http://orgprints.org/32744/1/Bioactualites-05-2018-haemmerli.pdf
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Deep roots of Brassica oleracea have high uptake of 15N-nitrate to 2 meters soil depth Organic Eprints
Kristensen, H.L.; Thorup-Kristensen, K..
• Deep roots may be important for uptake of NO3- by annual crops. A field experiment with the deep rooted crop curly kale (Brassica oleracea L. convar. acephala (DC.) Alef. var. sabellica L.) was performed to investigate root distribution and N uptake in deep soil layers. • Root distribution was investigated by use of minirhizotrons and root extractions to 2.4 m depth. The capacity for crop N uptake was studied by deep 15NO3- placement followed by analysis of plant 15N content after 3-30 days. • The atom percent 15N excess (APE) of plant samples was of similar size after uptake of 15N placed at depths in the range of 0.4-2 m. Root colonisation and start of 15N uptake were synchronized in 2.4 m depth. • The deep roots had higher inflow of 15N compared...
Tipo: Journal paper Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management; Air and water emissions.
Ano: 2006 URL: http://orgprints.org/7918/1/7918.pdf
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Defining a land boundary for sustainable livestock consumption Organic Eprints
Van Zanten, Hannah H.E.; Herrero, Mario; Van Hal, Ollie; Röös, Elin; Müller, Adrian; Garnett, Tara; Gerber, Pierre J.; Schader, Christian; de Boer, Imke J.M..
The need for more sustainable production and consumption of animal source food (ASF) is central to the achievement of the sustainable development goals: within this context, wise use of land is a core challenge and concern. A key question in feeding the future world is: how much ASF should we eat? We demonstrate that livestock raised under the circular economy concept could provide a significant, nonnegligible part (9–23 g/per capita) of our daily protein needs (~50–60 g/per capita). This livestock then would not consume human‐edible biomass, such as grains, but mainly convert leftovers from arable land and grass resources into valuable food, implying that production of livestock feed is largely decoupled from arable land. The availability of these biomass...
Tipo: Journal paper Palavras-chave: Animal husbandry; Air and water emissions.
Ano: 2018 URL: http://orgprints.org/34489/1/VanZanten-etal-2018-GlobalChangeBiology-Vol24-Issue9-p4185-4194.pdf
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Der Auslauf in der ökologischen Schweinemast: Verschmutzungsverteilung und Ammoniakemissionen Organic Eprints
Mielke, Gesa; Bussemas, Ralf; Clauß, Marcus; Linke, Stefan; Weißmann, Friedrich; Georg, Heiko.
Ammonia emissions are an important problem in agricultural systems. Organic pig production raises a claim to offer high animal welfare. However, gaseous emissions can exhaust out of outdoor runs. Many measurement technics to determine the ammonia volatilization in animal facilities exist. In outdoor runs it is necessary to define the air volume flow. In addition, the contaminated surface of the pig-yard is heterogeneous. Therefore, it is interesting if the ammonia concentration correlate with the amount of manure. The outdoor run has been divided in a matrix. The ammonia concentrations are determined with a multi-gas monitor (INNOVA 1312) in combination with a dynamic chamber. The study showed a difference in ammonia volatilization between roofed and...
Tipo: Conference paper, poster, etc. Palavras-chave: Air and water emissions; Pigs.
Ano: 2015 URL: http://orgprints.org/27169/1/27169_mielke.pdf
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Der Einfluss symbiotischer Bodenpilze auf den Stickstoffzyklus Organic Eprints
Bender, Franz; Conen, Franz; Neftel, Albrecht; Oberholzer, Hans-Rudolf; Olbrecht, Luise; Jocher, Markus; Rollog, Mark; van der Heijden, Marcel G.A.
To increase nutrient use efficiency and reduce nutrient losses are key aspects for sustainable agriculture. Arbuscular mycorrhizal fungi (AMF) are an import and widespread group of plant-symbiotic soil fungi. Here we investigate the role of those soil microorganisms, for effective nutrient recycling. We conducted greenhouse and lysimeter experiments to compare the cycling of important plant nutrients in systems with high and low abundance of AMF. AMF increased plant N nutrition, reduced leaching losses of mineral N, and prevented emissions of N2O, an important greenhouse gas. The results show the importance of AMF for an effective nutrient management. Farmers should implement strategies to promote AMF in the soil, as they are an indispensable compound of...
Tipo: Conference paper, poster, etc. Palavras-chave: Soil biology; Nutrient turnover; Air and water emissions.
Ano: 2013 URL: http://orgprints.org/21514/1/21514_Bender.pdf
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Development of the ammonia emission inventory in Finland : revised model for agriculture Organic Eprints
Grönroos, Juha; Mattila, Pasi; Regina, Kristiina; Nousiainen, Jouni; Perälä, Paula; Saarinen, Kristina; Mikkola-Pusa, Johanna.
Ammonia emissions in Finland have remained static in recent years and no big changes can be expected in the future as long as there are no drastic alterations in animal production. Similar to ammonia, the emissisons of nitrous oxide depend on the extent of agricultural production. For nitrous oxide the use of mineral fertilizer nitrogen is crucial, because it is the main source of the emissions. The ammonia emission factors obtained with the revised model are compared with emission factors from some other sources.
Tipo: Report Palavras-chave: Air and water emissions.
Ano: 2009 URL: http://orgprints.org/16399/1/ammonia.pdf
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Developments in greenhouse gas emissions and net energy use in Danish agriculture - How to achieve substantial CO2 reductions? Organic Eprints
Dalgaard, Tommy; Olesen, Jørgen E.; Petersen, B.M.; Petersen, Søren O.; Jørgensen, Uffe; Kristensen, Troels; Hutchings, Nicholas J.; Gyldenkerne, Steen; Hermansen, J.E..
Greenhouse gas (GHG) emissions from agriculture are a significant contributor to total Danish emissions. Consequently, much effort is currently given to the exploration of potential strategies to reduce agricultural emissions. This paper presents results from a study estimating agricultural GHG emissions in the form of methane, nitrous oxide and carbon dioxide (including carbon sources and sinks, and the impact of energy consumption/bioenergy production) from Danish agriculture in the years 1990-2010. An analysis of possible measures to reduce the GHG emissions indicated that a 50-70% reduction of agricultural emissions by 2050 relative to 1990 is achievable, including mitigation measures in relation to the handling of manure and fertilisers,...
Tipo: Journal paper Palavras-chave: Nutrient turnover; Air and water emissions; Buildings and machinery; Landscape and recreation; Farm nutrient management.
Ano: 2011 URL: http://orgprints.org/19044/4/19044.pdf
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Die Vorteile des Öko-Landbaus für das Klima Organic Eprints
Fliessbach, Andreas; Schmid, Heinz; Niggli, Urs.
Die Landwirtschaft ist durch die Produktion von Kohlendioxid, Lachgas und Methan mitverantwortlich für die Klimaerwärmung. Humusreiche Bio-Böden können das Klima jedoch entlasten.
Tipo: Journal paper Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services; Air and water emissions.
Ano: 2008 URL: http://orgprints.org/13031/1/fliessbach%2D2008%2DOeL%2D145.pdf
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Die Zukunft der Agrarsysteme - welche Rolle spielt der Ökolandbau? Organic Eprints
Hermanowski, Robert.
Unumstritten ist, dass das Klima stabilisiert, das Grundwasser vor Verunreinigungen geschützt und die biologische Vielfalt erhalten werden muss. Und dass das Geld kostet, ist auch jedem klar. Es geht um Geld, viel Geld, wenn man sich den Agrarhaushalt der EU anschaut. Aber beim Geld hört bekanntlich der Spaß auf. Dementsprechend engagiert wird die Diskussion geführt, welche Form der Landwirtschaft besonders nachhaltig ist und damit ökologische Leistungen erbringt, die entsprechend honoriert werden sollen.
Tipo: Newspaper or magazine article Palavras-chave: "Organics" in general; Air and water emissions; Biodiversity and ecosystem services.
Ano: 2018 URL: http://orgprints.org/32621/1/KAB_2018_119_126_Hermanowski.pdf
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Direkte dyrkning i tromlede Organic Eprints
Nielsen, Stig Feodor.
Presentation of the field trial in SoilVeg at AU-Aarslev showing roller crimping in vegetable production
Tipo: Newspaper or magazine article Palavras-chave: Soil quality; Crop combinations and interactions; Soil tillage; Air and water emissions; Vegetables; Biodiversity and ecosystem services; Weed management.
Ano: 2016 URL: http://orgprints.org/32027/1/Gartnertidende%2014_26-27%20%282016%29%20Direkte%20dyrkning%20i%20tromlede%20afgr%C3%B8der.pdf
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Discrimination of milk carbon footprints from different dairy farms when using IPCC Tier 1 methodology for calculation of GHG emissions from managed soils Organic Eprints
Schueler, Maximilian; Hansen, Sissel; Paulsen, Hans Marten.
Quantification of the environmental performance of dairy farms should allow comparisons between farms. We assess whether IPCC Tier 1 methodology for emissions from soil management is sufficiently precise to analyse and differentiate the carbon footprint of milk production between practical dairy farms and whether we can correctly identify which farms have the lowest and the highest GHG emissions per product unit, respectively. We used data from 20 Norwegian dairy farms which are very similar in structure, but differ in organic/non-organic management and the share of peat soil of their farmland.We assessed the uncertainty of the carbon footprint by running Monte Carlo simulations with the uncertainty ranges given in Tier 1 of the IPCC guidelines. The...
Tipo: Journal paper Palavras-chave: Production systems; "Organics" in general; Animal husbandry; Air and water emissions.
Ano: 2018
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Dobbeltdyrkning og plantebaserede gødninger til dyrkning af rækkeafgrøder - DoubleCrop Organic Eprints
Kristensen, Hanne Lakkenborg.
En samlet præsentation af DoubleCrop-projektet, herunder ideen om dobbeltdyrkning, anvendelse af plantebaserede gødninger, vinterjorddække og fokus på jordens frugtbarhed baseret på principperne for bæredygtige intensive økologiske dyrkningssystemer.
Tipo: Conference paper, poster, etc. Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Root crops.
Ano: 2019 URL: http://orgprints.org/35467/1/Poster%20skabelon_Statusm%C3%B8de_2019%20%28002%29_DoubleCrop.pptx
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DOC and DON from grass-clover - results from a field experiment Organic Eprints
Rasmussen, Jim; Høgh-Jensen, Henning.
The C and N dynamics in perennial grass-clover mixtures are not fully understood although such mixtures dominate temperate grassland. The co-existence of clover and grass involves both competition for and transfer of nutrients between the species. The nutrients that are competed for and transferred may originate from leaky root systems, from a rapid turnover of the fine root systems, or from degradation of more stabile organic material. The aim of the present study was to investigate the origin of dissolved organic C and N in perennial grass-clover mixtures. In an existing grass-clover ley, field mezotrons (cylinders with a diameter 30 cm) were installed in the spring of 2003 to depths of 20, 40 and 60 cm. Suction cups was installed beneath the...
Tipo: Conference paper, poster, etc. Palavras-chave: Air and water emissions.
Ano: 2005 URL: http://orgprints.org/9128/1/9128.pdf
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Does certified organic farming reduce greenhouse gas emissions from agricultural production? Comment on the McGee study Organic Eprints
Müller, Adrian; Aguilera, Eduardo; Skinner, Colin; Gattinger, Andreas.
A recent study by McGee (Agriculture and Human Values, 32, 255–263, 2015) from the University of Oregon has led to discussions in international media and on the web. This study addresses an interesting question and applies advanced statistics for its analysis. However, we identify several methodological flaws that invalidate the results. First, McGee tests a hypothesis that does not correspond to his main question and which does not allow McGee to derive the conclusions that are drawn in his paper and reported in the media coverage. Second, the data used are not adequate for the analysis because: i) the dependent variable does not reflect the greenhouse gas emissions characteristics of organic agriculture (e.g. different emission factors in organic and...
Tipo: Journal paper Palavras-chave: Crop husbandry; Air and water emissions; Policy environments and social economy.
Ano: 2016 URL: http://orgprints.org/30373/1/Muller-etal-AgHumVal-2016.pdf
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Does certified organic farming reduce greenhouse gas emissions from agricultural production? Reply to Muller et al Organic Eprints
McGee, Julius Alexander.
In this comment I respond to the criticisms put forth by Muller et al. It is my assessment that the authors' make useful suggestions for future analyses. However, their conclusion regarding the invalidity of my results are based on a misconception of the goals and data used in my article.
Tipo: Journal paper Palavras-chave: Crop husbandry; Air and water emissions; Policy environments and social economy.
Ano: 2016 URL: http://orgprints.org/30640/1/McGee-2016-response-to-Muller-AgrHumVal.pdf
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Does modelling of spatial heterogeneity matter? Organic Eprints
Hutchings, Nicholas J.; Petersen, Bjørn M.; Olesen, Jørgen E.; Berntsen, Jørgen.
The presence of grazing animals contributes to a much greater spatial heterogeneity in the cycling of C and N within grasslands, compared to arable land. This is primarily due to the deposition of excreta in patches rather than evenly over the field. However, an additional source of heterogeneity is introduced because grazing animals do not evenly utilise the grassland. Herbage contaminated by their faeces will tend to be rejected, as will poor quality (low digestibility) vegetation. There is therefore good reason to expect that C and N cycling will be highly spatially variable in grazed grassland. Hitherto, grassland models have assumed C and N dynamics to be uniform within a field. In this paper, modelling is used to investigate the potential effect of...
Tipo: Conference paper, poster, etc. Palavras-chave: Air and water emissions.
Ano: 2004 URL: http://orgprints.org/4132/1/4132.doc
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Does Organic Farming have Greater Potential to Adapt to Climate Change? Organic Eprints
Niggli, U.; Hepperly, P.; Fliessbach, A.; Maeder, P..
Agricultural production in most parts of the world will face less predictable weather conditions than mankind experienced during the intensification of agriculture over the last century. Especially South Asia and Southern Africa could suffer negative impact on several crops when no investments will be made into improved adaptiveness of the production systems. Besides specific technical measures (irrigation, breeding for drought improved or heat tolerant crops), the resilience of whole production systems is a very important focus. Organic agriculture is a highly knowledge-based technique for manipulating complex agro-ecosystems, for breeding locally adjusted seeds and livestock, and for producing on-farm fertilizers and inexpensive nature-derived...
Tipo: Conference paper, poster, etc. Palavras-chave: Environmental aspects; Air and water emissions.
Ano: 2008 URL: http://orgprints.org/13350/2/niggli%2Detal%2D2008%2Dadaptiveness%2Dsummary.doc
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Does organic livestock husbandry uses less energy and produces less greenhouse gas than conventional husbandry? Analysis in lactating sheep farms Organic Eprints
Dakpo, Hervé; LAIGNEL, G; Roulenc, M.; BENOIT, M..
We have undertaken in this work an evaluation of the greenhouse gas (GHG) emissions and the Non-Renewable Energy (NRE) consumption on a sample of 1250 farms-years, operating in sheep meat production, in either organic (OA) or conventional (CA) agriculture, over the period 1987 to 2012, based on the Life Cycle Assessment (LCA) method. There was no significant difference for NRE consumption (79.6 MJ in OA and 79.7 MJ in CA, per kg of carcass); indeed the gains in OA thanks to a lower use of chemical fertilizers and purchase of lesser concentrates feed were offset by the higher level of mechanization (here fuels and equipment). For GHG emissions, we found a significant difference of 5% beneficial to organic production systems (31.1 vs. 32.7 kg CO2 eq/kg...
Tipo: Journal paper Palavras-chave: Animal husbandry; Air and water emissions; Sheep and goats; Environmental aspects.
Ano: 2013 URL: http://orgprints.org/26232/1/Dakpo_2013_CIAG_Vol32.pdf
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