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| Registros recuperados: 30 | |
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| Hansen, Preben Klarskov. |
| Controlling weeds in spring cereals grown under organic conditions is mostly done by post emergence weed harrowing, where spring tines of the weed harrow control weeds by uprooting and/or covering small weeds plants with soil. In situations with relatively large weed plants and relatively small crop plants, there are increased risks for crop damages by soil coverage or other mechanical damages of the crop leaves. These damages are increasing with increasing weed control intensity, and are resulting in reduced crop growth immediately after weed harrowing. There are risks that the reduced growth reduces final crop yield too. However, there is some evidence that there are varietal differences in the tolerance to weed harrowing. The aim of this study was... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Weed management Breeding; Genetics and propagation. |
| Ano: 2005 |
URL: http://orgprints.org/5913/1/5913.pdf |
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| 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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| 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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| 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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| Rasmussen, Ilse Ankjær; Holst, Niels; Graglia, Enrico; Hansen, Preben Klarskov; Melander, Bo; Mathiassen, Solvejg Kopp; Kudsk, Per; Jensen, Peter; Boelt, Birte; Madsen, Katrine Hauge. |
| Ukrudtsplanters livsprocesser, f.eks. spiring, vækst og blomstring, og samspil med andre organismer, f.eks. andet ukrudt, afgrøder og insekter. |
| Tipo: Book chapter |
Palavras-chave: Weed management. |
| Ano: 2004 |
URL: http://orgprints.org/4593/1/4593.pdf |
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| 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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| Registros recuperados: 30 | |
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