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Registros recuperados: 30
Primeira ... 12 ... Última
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A weed suppressive index for spring barley (Hordeum vulgare L.) varieties Organic Eprints
Hansen, Preben Klarskov; Willas, Jakob; Kristensen, Kristian.
A screening programme for crop variety competitiveness would ideally be based on only a few, non-destructive measurements of key growth traits. In this study we measured the weed suppressive ability of 79 varieties of spring barley in two ways: 1) directly, by weed coverage assessments under weedy conditions at three Danish locations in 2002-2004, and 2) indirectly, by non-destructive measurements of varietal growth traits under weed-free conditions in 17 other experiments in Denmark in 2001-2003. Based on just four varietal growth traits (reflectance, leaf area index, leaf angle and culm length), we successfully developed a method for indexing the weed suppressive ability of spring barley varieties. The suppressive index ranged from 12% in ‘Lux’ and 55%...
Tipo: Journal paper Palavras-chave: Crop combinations and interactions Weed management Breeding; Genetics and propagation.
Ano: 2008 URL: http://orgprints.org/11294/2/11294.pdf
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Beregning af konkurrenceindeks i vinterhvede og vårbyg (KI) Organic Eprints
Hansen, Preben Klarskov.
Dette dokument beskriver hvilke data der indgår i beregningen af konkurrenceindekset samt hvorledes det er udregnet. Endvidere data i tabelform for vinterhvede og vårbygsorter der var i afprøvning i 2004.
Tipo: Other Palavras-chave: Crop health; Quality; Protection Weed management Breeding; Genetics and propagation.
Ano: 2004 URL: http://orgprints.org/5918/1/5918.pdf
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Beregning af konkurrenceindeks (KI) Organic Eprints
Hansen, Preben Klarskov.
Dokumentet indeholder en beskrivelse af hvordan konkurrenceindekset beregnes i vinterhvede og vårbyg.
Tipo: Report chapter Palavras-chave: Cereals; Pulses and oilseeds Crop combinations and interactions Weed management.
Ano: 2005 URL: http://orgprints.org/7874/1/7874.pdf
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Beregning af konkurrenceindeks (KI) Organic Eprints
Hansen, Preben Klarskov.
Dokumentet indeholder en beskrivelse af hvordan konkurrenceindekset beregnes i vinterhvede og vårbyg. Samt tabeller med konkurrenceindeksene for alle afprøvede vårbyg- og vinterhvedesorter i 2006
Tipo: Report chapter Palavras-chave: Cereals; Pulses and oilseeds Crop combinations and interactions Weed management.
Ano: 2006 URL: http://orgprints.org/11293/1/sortsfors%C3%B8g_2006.pdf
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Beregning af konkurrenceindeks (KI) Organic Eprints
Hansen, Preben Klarskov.
Dokumentet indeholder en beskrivelse af hvordan konkurrenceindekset beregnes i vinterhvede og vårbyg.
Tipo: Report chapter Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Weed management.
Ano: 2003 URL: http://orgprints.org/3422/1/3422.pdf
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Cirsium arvense responses to stubble cultivation and catch crops in organic cropping systems Organic Eprints
Holst, Niels; Melander, Bo; Rasmussen, Ilse A.; Hansen, Preben Klarskov.
Field studies on perennial weeds, such as Cirsium arvense, are necessary to study the systemic effects of weed control. In this study we analyse the responses in above-ground C. arvense biomass and crop yield from results obtained in two organic field experiments, both combining stubble cultivation with post-harvest catch crops. A range of catch crops was investigated, varying in both species mixture and method of establishment, yet stubble cultivation was the only treatment found to reduce C. arvense density. The effect was even seen only in one year when a harsh winter acted synergistically with soil tillage. C. arvense exhibited density-dependent growth, in terms of above-ground biomass at harvest, with an estimated max. exponential growth rate of...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2012 URL: http://orgprints.org/20590/4/20590.pdf
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Design og sortsvalg i specialforsøg BAROF-WP2 – Ukrudtskonkurrence Organic Eprints
Hansen, Preben Klarskov; Rasmussen, Ilse A..
Forsøgsplan for forsøg med ukrudtskonkurrenceevne i BAROF.
Tipo: Report Palavras-chave: Weed management Breeding; Genetics and propagation Cereals; Pulses and oilseeds.
Ano: 2003 URL: http://orgprints.org/1487/1/WP2_100703.pdf
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Direct control of perennial weeds between crops – implications for organic farming Organic Eprints
Melander, Bo; Rasmussen, Ilse A.; Holst, Niels; Hansen, Preben Klarskov.
Perennial weeds can be a major constraint to organic crop production in several North European 26 countries. Preventive and cultural control measures may not suffice when infestations with perennials 27 become severe. Direct control actions applied between crops can then be necessary to reduce the 28 problems. We conducted two experiments, one on a sandy loam and one on a sandy soil, respectively, in 29 Denmark, with the aim of studying the efficacy of different implement types and strategies. The 30 treatments were employed against mixed stands of perennials after harvest of spring barley in two 31 consecutive years. Time of treatment, cultivation depth and combinations of implements constituted the 32 strategies. Treatment effects were evaluated in the...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2012 URL: http://orgprints.org/22000/7/22000.pdf
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Direct control of perennial weeds between crops – implications for organic farming Organic Eprints
Melander, Bo; Rasmussen, Ilse A.; Holst, Niels; Hansen, Preben Klarskov.
Perennial weeds can be a major constraint to organic crop production in several North European 26 countries. Preventive and cultural control measures may not suffice when infestations with perennials 27 become severe. Direct control actions applied between crops can then be necessary to reduce the 28 problems. We conducted two experiments, one on a sandy loam and one on a sandy soil, respectively, in 29 Denmark, with the aim of studying the efficacy of different implement types and strategies. The 30 treatments were employed against mixed stands of perennials after harvest of spring barley in two 31 consecutive years. Time of treatment, cultivation depth and combinations of implements constituted the 32 strategies. Treatment effects were evaluated in the...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2011 URL: http://orgprints.org/20625/4/20625.pdf
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Forskelle i bygsorters tolerance overfor ukrudtsharvning Organic Eprints
Hansen, Preben Klarskov.
dette dokument beskriver resultater fra 2 års forsøg med ukrudtsharvning af 4 sorter og 2 eller 3 komponentblandinger af disse sorter.
Tipo: Journal paper Palavras-chave: Crop health; Quality; Protection Weed management Breeding; Genetics and propagation.
Ano: 2005 URL: http://orgprints.org/5915/1/5915.PDF
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Forskellige sorters konkurrenceevne overfor ukrudt Organic Eprints
Hansen, Preben Klarskov; Kristensen, Kristian; Willas, Jakob.
Sorter med en god konkurrenceevne overfor ukrudt har en hurtig fremspiring og vækst, de er langstråede og de har udbredte blade.
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management Breeding; Genetics and propagation.
Ano: 2006 URL: http://orgprints.org/7878/1/7878.doc
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Forslag til forsøgsdesign for WP1 2004 og 2005 på Forskningscenter Flakkebjerg Organic Eprints
Hansen, Preben Klarskov; Rasmussen, Ilse A.; Kristensen, Kristian; Willas, Jakob.
Dokumentet indeholder forslag til forsøgsdesign for BAR-OF, WP1 forsøget beliggende på Forskningscenter Flakkebjerg i 2004 og 2005
Tipo: Report Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Weed management Production systems Surveys and statistics Specific methods.
Ano: 2004 URL: http://orgprints.org/3417/1/3417.pdf
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Forsøgsbeskrivelse af specialforsøg BAR-OF WP2 2004 Organic Eprints
Hansen, Preben Klarskov; Kristensen, Kristian; Rasmussen, Ilse A..
Dokumentet indeholder en beskrivelse af specialforsøget BAR-OF WP2 beliggende på Forskningscenter Flakkebjerg.
Tipo: Report Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Cereals; Pulses and oilseeds Weed management.
Ano: 2004 URL: http://orgprints.org/3432/1/3432.pdf
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Forsøgsbeskrivelse af specialforsøg BAROF WP2 2005 Organic Eprints
Hansen, Preben Klarskov; Kristensen, Kristian; Rasmussen, Ilse A..
This document describes the design and layout of the field trial WP2 in 2005 at Research Centre Flakkebjerg. The experiment contains 4 pure genotypes and 2 or 3 component mixtures of these genoypes. Further the experiment contains 2 levels of pesticide treatment (with/without), 2 levels of mechanical weed control (with/without) and 2 levels of pig slurry application rates (40 and 80% of recommended need.
Tipo: Report Palavras-chave: Crop health; Quality; Protection Weed management Breeding; Genetics and propagation.
Ano: 2005 URL: http://orgprints.org/5914/1/5914.pdf
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Globalisation as a challenge or opportunity for organic farming Organic Eprints
El-Nagger, Ahmed; Ounmaa, Andres; Muukka, Eija; Zaleckas, Ernestas; Abraityté, Gerda; Jansons, Imants; Rasmussen, Jim; Ahnström, Johan; Pirhofer-Walzl, Karin; Jensen, Katherine O’Doherty; Jørgensen, Kirstine F.; Sarunaite, Lina; Bleidere, Mara; Knudsen, Marie Trydeman; Pugliese, Massimo; Nielsen, Merete Højrup Møller; Mugurerza, Natalia Bellostas; Bakewell-Stone, Petra; Hansen, Preben Klarskov; Al-Kufaishi, Sermed Adil Abed-Ali; Kobayashi, Sofie; Rydberg, Torbjörn; Klubova, Vera; Liorancas, Viktoras; Høgh-Jensen, Henning.
During one intensive week in October 2005, the authors were gathered to discuss the impact that globalisation has on the Organic Food Systems and the opportunities that globalisation opens up for developing these systems. The meeting took place as a Ph.D. course under the auspices of the Research School of Organic Farming and Food Systems (SOAR; www.soar.dk). All participants research within Organic Agriculture and Food Production in one way or another.
Tipo: Journal paper Palavras-chave: Food security; Food quality and human health "Organics" in general Food systems Markets and trade Values; Standards and certification.
Ano: 2006 URL: http://orgprints.org/9333/1/9333.pdf
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How is ideologies related to actions? Organic Eprints
Lund-Nielsen, Tina; Mejer, Helena; Gunnarsson, Carina; Hansen, Preben Klarskov; Grigalaviciene, Ilona.
The document is an assessment for the SOAR summerschool in 2003, and describes the results from interviews with the scientists Dr. Johanna Björklund, Centre for Sustainable Agriculture, Swedish University of Agricultural Sciences, Sweeden and Ass. Prof. Dr. Thomas van Elsen, Department of Organic Farming and Cropping Systems, University of Kassel,Germany
Tipo: Report Palavras-chave: Research methodology and philosophy; Policy environments and social economy; "Organics" in general; Indicators and other value-laden measures; Landscape and recreation; Biodiversity and ecosystem services.
Ano: 2003 URL: http://orgprints.org/3487/1/3487.pdf
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Hvad er en god vårbyg til økologisk jordbrug? Organic Eprints
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
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Important values in the PhD-project "Crop-Weed interaction determined by sensor techniques (COMSENS)" and the project "Characteristics of spring barley varieties for organic farming (BAR-OF)" Organic Eprints
Hansen, Preben Klarskov.
The document describes with the chosen values in the PhD-project “Crop-Weed interaction deter-mined by sensor techniques (COMSENS)” and the project “Characteristics of spring barley varieties for organic farming (BAR-OF)”
Tipo: Report Palavras-chave: Research methodology and philosophy; "Organics" in general; Indicators and other value-laden measures; Weed management.
Ano: 2004 URL: http://orgprints.org/3499/1/3499.pdf
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Index beregner hvor godt økologisk vårbyg konkurrerer med ukrudt Organic Eprints
Rasmussen, Ilse A.; Hansen, Preben Klarskov.
Kornafgrøder og –sorter har forskellig evne til at undertrykke ukrudt. Dette skyldes blandt andet sortens evne til at skygge for lyset og optage vand og næringsstoffer. For sorter med en samlet god konkurrenceevne gælder at: de er langstråede de har kraftig bladmasse gennem vækstsæsonen de har en hurtig fremspiring og vækst Denne viden er udnyttet til at beregne et konkurrenceindeks af sorten overfor ukrudt. De fleste forsøg vedrørende disse forskelle er gennemført under konventionelle forhold, hvor niveauet af næringsstoffer er højt, og ukrudt og andre skadevoldere bekæmpes kemisk. Under økologiske forhold vil der oftest være en lavere og mere varierende forsyning med næringsstoffer. For at afklare om dette har en betydning for...
Tipo: Journal paper Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management.
Ano: 2005 URL: http://orgprints.org/5917/1/5917.PDF
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Langsigtet balance i ukrudtsbestanden Organic Eprints
Rasmussen, Ilse A.; Melander, Bo; Hansen, Preben Klarskov; Holst, Niels.
Dokumentet beskriver hvorledes den langsigtede balance i ukrudtsbestanden kan simuleres ved hjælp af en populationsdynamisk model, samt hvordan balancen kan rykkes til landmandens fordel. f.eks ved hjælp af konkurrencestærke sorter
Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions; Weed management; Production systems.
Ano: 2004 URL: http://orgprints.org/3418/1/3418.pdf
Registros recuperados: 30
Primeira ... 12 ... Última
 

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