Consulta: creatorFacets:"Østergård, Hanne"
Registros recuperados: 25
Data/hora: 02/06/2024 17:09:59

Endelig en COST-aksjon med økologisk siktemål
Provedor de dados: 21
Autores: Løes, Anne-Kristin; Østergård, Hanne.
Information om SUSVAR-netværket (COST860) og dets relation til FØJO II BAR-OF
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Cereals; Pulses and oilseeds Weed management Breeding; Genetics and propagation Soil tillage.
Ano: 2004
URL: http://orgprints.org/3551/1/3551.pdf

Meta-Analysis on grain yield effects of cereals-legume intercropping
Provedor de dados: 21
Autores: Gaëlle, Chastaing; Østergård, Hanne; Pødenphant, Lars; Jørnsgård, Bjarne; Skovgaard, Ib.
Meta-Analysis on grain yield effects  of cereals-legume intercropping
Tipo: Report
Palavras-chave: Production systems.
Ano: 2009
URL: http://orgprints.org/17168/1/17168.pdf

Forædlingsmål og forædlingsopgaver i økologisk korn og bælgsæd
Provedor de dados: 21
Autores: Kristensen, Lars; Østergård, Hanne; Jørnsgård, Bjarne.
Vigtige forædlingsmål og metoder for økologiske sorter diskuteres og der gives anbefalinger til prioriteringer.
Tipo: Report chapter
Palavras-chave: Breeding; Genetics and propagation.
Ano: 2001
URL: http://orgprints.org/3119/1/Foraedlingsmaal.pdf

Yield of spring barley mixtures as a function of varietal and environmental characteristics
Provedor de dados: 21
Autores: Kiær, Lars; Skovgaard, Ib; Østergård, Hanne.
To design good variety mixtures it is important to understand the influence of varietal and environmental characteristics on mixing effect, e.g. what characteristics are more beneficial when all mixed varieties express it highly and what characteristics are more beneficial when the mixed varieties express it to varying extent. However, as it is generally impossible to manage more than a few experimental combinations in each field trial, information on general relationships and factors of importance for the successful design of variety mixtures may be overlooked. Using meta-regression (e.g. Houwelingen et al. 2002), numerous results of such trials can be combined, and the influence of varietal and environmental factors on mixing effect can be elucidated....
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Crop combinations and interactions Breeding; Genetics and propagation.
Ano: 2007
URL: http://orgprints.org/11371/1/11371.pdf

RESOURCE USE IN A LOW-INPUT ORGANIC VEGETABLE FOOD SUPPLY SYSTEM IN UK - A CASE STUDY
Provedor de dados: 21
Autores: Østergård, Hanne; Markussen, Mads Ville; Kullak, Michal; Nemecek, Thomas; Smith, Laurence.
Use of local renewable resources in a low-input organic vegetable food supply system in UK is evaluated against the use of imported resources in the same system. Despite much focus by the farmer on low-input, the production and distribution system is only supported by 13% local renewable resources based on an emergy assessment. Future sustainability of such systems are discussed.
Tipo: Conference paper, poster, etc.
Palavras-chave: Production systems Farming Systems Recycling; Balancing and resource management Vegetables Policy environments and social economy.
Ano: 2014
URL: http://orgprints.org/24083/1/24083%20paper%20OWC14%20-%20revised_MM.pdf

Efficiency of incomplete split-plot designs – a compromise between traditional split-plot designs and randomised complete block design
Provedor de dados: 21
Autores: Kristensen, Kristian; Bigongiali, Federica; Østergård, Hanne.
The paper shows, how incomplete split-plot designs can be constructed from -designs and how they can be analysed. The incomplete split-plot design can be regarded as both a practical and statistical compromise between traditional split-plot design and randomised complete block design. The efficiency of the design is compared to traditional split-plot design and randomised complete block design using data from 5 trials carried out using incomplete split-plot designs in Denmark through 2004-2007. The comparisons showed that the incomplete split-plot design were superior to traditional split-plot design in most cases – and in all cases when comparing differences among treatments in the whole-plot factor. The incomplete split-plot design was in many cases...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems; Crop husbandry.
Ano: 2008
URL: http://orgprints.org/20887/3/20887.pdf

Opinions on biogas in organic farming
Provedor de dados: 21
Autores: Heiske, Stefan; Østergård, Hanne.
The application of biogas technologies in organic farming  involves many considerations: Benefits like improved fertilizer supply and fossil fuel savings are opposed to concerns about economical risks and incompliance with organic principles.  A questionnaire developed by Risø DTU gives an idea about some Danish stakeholders’ perceptions of benefits and drawbacks.
Tipo: Newspaper or magazine article
Palavras-chave: Denmark; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/18983/4/18983.pdf

Net blotch severity is best assessed at early grain filling with respect to its effect on grain weight of spring barley
Provedor de dados: 21
Autores: Pinnschmidt, Hans O.; Vollmer, Jeanette H.; Østergård, Hanne; Munk, Lisa.
Appropriate disease assessment methods and parameters reflecting whole-season disease severity levels in field plots remain important issues in studies related to plant disease epidemiology, disease resistance of crop cultivars, and disease-induced yield losses. Such methods and parameters should be yield-related to ensure relevance. Net blotch severity was determined over time in inoculated and non-inoculated field plots of three spring barley varieties by whole plot assessments and by assessments of individual leaves of single main tillers. Disease severity measures such as the area-under-disease-progress-curve, mean and maximum severity as well as severity levels at specific growth stages (GS) were derived from the data. Their relation to thousand grain...
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection.
Ano: 2007
URL: http://orgprints.org/10677/1/10677.pdf

Genetic potential for grain yield in spring barley varieties and variety mixtures in variable organic environments
Provedor de dados: 21
Autores: Østergård, Hanne; Kristensen, Kristian; Hovmøller, Mogens; Willas, Jakob.
For organic crop production, well-characterised varieties increase the possibilities for controlling diseases and weeds and compensating for deficits in nutrients. Variation in grain yield was studied in about 150 spring barley varieties and variety mixtures and 20 combinations of location, growing system and year. Choice of variety was found to be as important a factor for grain yield as other factors in the management. Some variety mixtures out yielded even the best variety in the mixture, when this was grown in pure stand. Finally, a concept for organic variety testing of spring barley was developed. This Danish project is part of a European COST Network on sustainable low-input cereal production (SUSVAR) which coordinates studies in different countries...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Regulation Crop combinations and interactions Weed management Breeding; Genetics and propagation Biodiversity and ecosystem services.
Ano: 2006
URL: http://orgprints.org/8136/1/Hanne_Oestergaard_spring_barley_varieties.pdf

Biogas i økologisk jordbrug
Provedor de dados: 21
Autores: Østergård, Hanne.
Hvilke faktorer har størst betydning for udbredelsen af  biogasteknologien? Offentlige tilskud er svaret fra en rundspørge.
Tipo: Newspaper or magazine article
Palavras-chave: Technology assessment.
Ano: 2011
URL: http://orgprints.org/19038/4/19038.pdf

Meta-analysis is a powerful tool to summarize variety mixture effects - exemplified by grain yield and weed suppression of spring barley
Provedor de dados: 21
Autores: Kiær, Lars; Skovgaard, Ib; Østergård, Hanne.
In a new project, we aim to increase the general understanding of the power of meta-analysis to combine existing experimental results on variety mixtures. In this way, explanatory power can be increased compared to separate analyses and overall measures and relationships may be revealed. We will thus pursue to uncover a number of critical issues, including the relative importance of various traits and trait combinations on mixing success. To demonstrate the methods of meta-analysis applicable for variety mixture data, we considered a data set consisting of grain yield and weed ground cover assessments in 16 field trials of six 3-component variety mixtures and their components (part of the Danish BAR-OF field trials). The effects of mixing were analysed...
Tipo: Conference paper, poster, etc.
Palavras-chave: Environmental aspects Crop health; Quality; Protection Crop combinations and interactions Weed management Farming Systems.
Ano: 2006
URL: http://orgprints.org/9380/1/9380.pdf

Sortsafprøvning i korn og bælgsæd i økologisk jordbrug
Provedor de dados: 21
Autores: Kristensen, Lars; Østergård, Hanne; Jørnsgård, Bjarne.
Behovet for og organiseringen af sortsafprøvning i forbindelse med økologisk jordbrug diskuteres
Tipo: Report chapter
Palavras-chave: Breeding; Genetics and propagation.
Ano: 2001
URL: http://orgprints.org/3121/1/Sortsafproevning.pdf

Studies of interaction between pathogens
Provedor de dados: 21
Autores: Vollmer, Jeanette; Østergård, Hanne.
A fundamental ecological observation is that activity of any organism affects the environment in which it lives. This has consequences not only for that organism or members of that species, but for other species inhabiting the same environment. It means that the dynamics of a population of a species living in a given environment cannot be evaluated without considering other species in the same environment and the interactions with and between these. Two species may experience several potential interaction types, e.g. competition (A and B have a negative effect on each other), mutualism (A and B have a positive effect on each other) or exploitation (A has positive effect on B, while B has negative effect on A), which may be either direct or indirect.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection.
Ano: 2004
URL: http://orgprints.org/3363/1/3363.doc

Givtig blanding af forskere og græsrødder ved økologi-kongres i Australien
Provedor de dados: 21
Autores: Rasmussen, Ilse A.; Halberg, Niels; Hermansen, John; Østergård, Hanne.
International Society of Organic Agriculture Research (ISOFAR) afholdt sin første videnskabelige konference d. 21.-23. September 2005 i Adelaide, Australien. ISOFAR konferencen blev holdt samtidig med 15th IFOAM Organic World Congress: Shaping Sustainable Systems og 8th International IFOAM Organic Viticulture and Wine Conference. Der var omkring 1000 deltagere fra mere end 50 lande til hele arrangementet, heraf knap 25 danskere, flest forskere. Der var 11 danske indlæg og 3 postere på ISOFAR-delen og 8 danske indlæg og 3 postere på IFOAM-delen - så Danmark var godt repræsenteret.
Tipo: Journal paper
Palavras-chave: Research communication and quality.
Ano: 2005
URL: http://orgprints.org/7921/1/7921.doc

Characteristics of spring barley varieties for organic farming
Provedor de dados: 21
Autores: Østergård, Hanne; Jensen, Jakob Willas.
Characteristics of spring barley varieties for organic farming
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation.
Ano: 2004
URL: http://orgprints.org/3364/1/3364.doc

Characteristics of spring barley varieties for organic farming
Provedor de dados: 21
Autores: Østergård, Hanne.
Modern spring barley varieties have been developed with the aim of combining high productivity and standardised product quality under high-input conditions using pesticides for control of weeds, diseases and insects as well as heavy application of nutrient-rich and water-soluble inorganic fertilizers. In the organic growing system, biotic and abiotic stresses have to be overcome by growing the appropriate varieties and by practicing good farm management. The important spring barley traits to be considered in organic farming are related to the inherited viability and adaptation of plants to survive biotic and abiotic stresses and includes competitive ability (morphology, weed tolerance, growth rate, allelopathy), disease resistance (morphology, specific and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Surveys and statistics Crop combinations and interactions Breeding; Genetics and propagation Farming Systems Cereals; Pulses and oilseeds.
Ano: 2002
URL: http://orgprints.org/1406/1/ecopb_poster_berlin_A4.pdf

Effects of inter-varietal diversity, biotic stresses and environmental productivity on grain yield of spring barley variety mixtures
Provedor de dados: 21
Autores: Kiær, Lars P.; Skovgaard, Ib M.; Østergård, Hanne.
Varietal seed mixtures tend to increase and stabilize crop yields, yet their application is sparse. Large-scale cultivation of variety mixtures may require a better understanding of how inter-varietal interactions and their interaction with the environment may influence the grain yield of variety mixtures relative to their component varieties. For this purpose, six variety mixtures of spring barley and 14 component varieties were grown in each of 17 trial environments. A total of 28 observed and a priori plant characteristics, including grain yield, disease severity and weed competitiveness, were derived for each component variety in each trial. The relationship between inter-varietal diversity of each characteristic and the mixing effect on grain yield...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions.
Ano: 2012
URL: http://orgprints.org/21001/1/21001.pdf

Hvad er en god vårbyg til økologisk jordbrug?
Provedor de dados: 21
Autores: Rasmussen, Ilse A.; Østergård, Hanne; Willas, Jakob; Nielsen, Niels Erik; Hansen, Preben Klarskov; Hovmøller, Mogens; Backes, Gunter.
Gennemgang af hvad en god vårbygsort er for økologisk jordbrug. Sortsvalg, udbytte, sortsblandinger, næringsstofoptagelse, ukrudtskonkurrenceevne, sygdomsrobusthed, molekulære markører.
Tipo: Report
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation.
Ano: 2004
URL: http://orgprints.org/3435/1/3435.pdf

Sortsblandinger af byg til økologisk jordbrug
Provedor de dados: 21
Autores: Østergård, Hanne; Bardtrum, Lars; Jensen, Jakob Willas.
Første års resultater fra et sortsblandingsforsøg med vårbyg i projektet BAR-OF
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Cereals; Pulses and oilseeds.
Ano: 2004
URL: http://orgprints.org/3545/1/F%C3%98JOenyt.pdf

Energy and emergy evaluation of potentials for energy self-sufficiency in Danish organic dairy farms by production of biogas and bioethanol
Provedor de dados: 21
Autores: Markussen, Mads Ville; Østergård, Hanne; Oleskowicz-Popiel, Piotr; Schmidt, Jens Ejby; Pugesgaard, Siri.
One obvious way to enhance agricultural resilience is for farms to increase self-sufficiency with necessities such as fuel, fodder and fertilizer. Our research seeks to uncover these potentials for Danish organic dairy farming.  The setting is a theoretical model of a farm-cooperation of 10 farms of 100 ha each producing only milk and animals for slaughtering and being self-sufficient with fodder and fertilizer. The question is if they can be self-sufficient with energy by means of shared biogas and/ or bioethanol production facilities. The method is mapping of energy, emergy (embodied energy measured in solar energy joules) and mass flows in different scenarios, that are based on empirical data from Danish dairy farms concerning mix of crops, crop yields,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems Recycling; Balancing and resource management Technology assessment.
Ano: 2009
URL: http://orgprints.org/15842/1/15842_Abstract.pdf

Socio-economic analysis of biogas and biogas combined with ethanol from organic agriculture
Provedor de dados: 21
Autores: Johansson, Sheshti; Nielsen, Lars Henrik; Østergård, Hanne.
Two different scenarios of biogas production based on  energy crops and manure and one scenario where the biogas production is combined with bioethanol production were evaluated with socio-economic analysis. The products from the biogas plants are heat and electricity as well as organic fertilizer. The socio-economic analysis compares the scenarios with a Danish organic farming reference scenario. There are several levels of analysis, where different external aspects are added in each level, e.g. externalities such as savings in CO2-emissions by replacing fossil fuels. The competition between use of land for bioenergy or for food is evaluated.
Tipo: Report
Palavras-chave: Recycling; Balancing and resource management.
Ano: 2011
URL: http://orgprints.org/19039/2/19039.pdf

Grain yield increase in cereal variety mixtures: A meta-analysis of field trials
Provedor de dados: 21
Autores: Kiær, Lars P.; Skovgaard, Ib; Østergård, Hanne.
Plant ecology theory predicts that growing seed mixtures of varieties (variety mixtures) may increase grain yields compared to the average of component varieties in pure stands. Published results from field trials of cereal variety mixtures demonstrate, however, both positive and negative effects on grain yield. To investigate the prevalence and preconditions for positive mixing effects, reported grain yields of variety mixtures and pure variety stands were obtained from previously published variety trials, converted into relative mixing effects and combined using meta-analysis. Furthermore, available information on varieties, mixtures and growing conditions was used as independent variables in a series of meta-regressions. Twenty-six published studies,...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Surveys and statistics.
Ano: 2009
URL: http://orgprints.org/16964/1/16964.pdf

Discussion documents – SUSVAR Visions Workshop, Karrebæksminde, Denmark, April 2008
Provedor de dados: 21
Autores: Østergård, Hanne.
Seven discussion documents were made during the SUSVAR Visions workshop ‘Sustainable cereal production beyond 2020: Visions from the SUSVAR1 network’, Karrebæksminde, Denmark, 14-16 April 2008. At the workshop, one discussion documents was written for each of the topics mentioned below. In total 55 persons from 21 European countries participated in the process. The participants came from different disciplines: genetics, plant breeding, genetic resources, agronomy, plant pathology, soil science, biometry and system analysis, all specialised in the area of cereal production.  The approach taken at the workshop was to focus on envisioning the future of sustainable agriculture, especially cereal production. This was done by scientific creative thinking on the...
Tipo: Working paper
Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management Breeding; Genetics and propagation Soil tillage.
Ano: 2008
URL: http://orgprints.org/14956/1/14956.pdf

Multiple diseases, host resistance and the role of variety mixtures for disease control in organically grown spring barley
Provedor de dados: 21
Autores: Pinnschmidt, Hans; Vollmer, Jeanette H.; Hovmøller, Mogens S.; Munk, Lisa; Østergård, Hanne.
The presence of more than one disease at the same time is common in farmers’ fields. The use of disease resistant varieties is one of the most important disease management components in organic farming. While many modern spring barley cultivars possessing good resistance to individual diseases are available today, cultivars resistant to multiple diseases are still scarce because breeding for multiple disease resistance is a difficult and lengthy task. Mixing cultivars possessing high levels of resistance to individual diseases may be a good option to control multiple diseases in ecological farming. Research is underway in Denmark in which the effects of resistance properties of spring barley varieties on the development of two important foliar diseases,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Cereals; Pulses and oilseeds.
Ano: 2002
URL: http://orgprints.org/1315/1/Poster_JHV.pdf

Egenskaber ved sorter af vårbyg til økologisk dyrkning
Provedor de dados: 21
Autores: Østergård, Hanne; Kristensen, Kristian; Willas, Jakob; Deneken, Gerhard.
Sorternes dyrkningsmæssige egenskaber bliver meget vigtigere, når skadegørere og næringsstoftilførsel ikke kan kontrolleres med pesticider og syntetisk gødning. I et nyt FØJO-projekt er det derfor målet at karakterisere de økologiske dyrknigsegenskaber hos vårbygsorterne (vårkornsorterna)
Tipo: Journal paper
Palavras-chave: Breeding; Genetics and propagation Cereals; Pulses and oilseeds.
Ano: 2002
URL: http://orgprints.org/638/1/vaarbyg_egenskaber.pdf