|
|
|
| Registros recuperados: 117 | |
|
| |
|
|
| Olesen, Jørgen E.; Askegaard, Margrethe; Rasmussen, Ilse A.. |
| Jordens frugtbarhed opbygges og vedligeholdes gennem anvendelse af grøngødning, efterafgrøder og bælgsæd. Disse faktorer er i Danmark undersøgt i et forsøg med økologiske kornsædskifter på fire forskellige jordtyper. Der var store forskelle mellem lokaliteter med hensyn til udbytteniveau, udvaskning af næringsstoffer og forekomst af ukrudt. Mens de største kornudbytter blev høstet på lerjordene blev den største mængde råprotein i ært/byg høstet på sandjordene. På lerjorden og den lerblandede sandjord var der en god sammenhæng mellem udbyttet i vinterhvede og kvælstofopsamlingen i den forudgående kløvergræs, hvorimod kvælstofudvaskning på den grovsandede jord reducerede udbyttet i vinterhvede betydeligt. Udvaskningen af N var størst på den grovsandede jord.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2002 |
URL: http://orgprints.org/1807/1/C0022.doc |
| |
|
| |
|
|
| Rasmussen, Ilse A.. |
| Organic Eprints is an open, on-line archive for research in organic food and farming with more than 10,000 publications - and growing rapidly. All use of the archive is free of charge. There are 15,000 registered users of Organic Eprints, and the archive has more than 175,000 visits each month. The archive contains scientific and popular articles, reports, presentations, project descriptions, books and other research publications. For each publication there is a short summary along with information about authors and contacts, publishing details, peer review status, subject area and research affiliation. In most cases, the full articles are freely available for download. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Technology transfer; Research communication and quality. |
| Ano: 2011 |
URL: http://orgprints.org/19570/4/19570.pdf |
| |
|
| |
|
| |
|
|
| Rasmussen, Ilse A.; Sønderskov, Mette; Damgaard, Christian; Kristensen, Kristian. |
| The impact of crop rotation, nutrient levels and use of catch crops on effect of E. repens on a sandy soil at Jyndevad on yield of winter wheat (2006), spring barley (2007-2008) and faba bean (2006-2008) was studied in an existing organic crop rotation experiment (Olesen et al., 2000; Rasmussen et al., 2006). Some of the objectives were to determine the yield loss at different levels of infestation of the weed, and to determine whether this relationship was influenced by the treatments. For all crops, the treatments had a high impact on the yield. The two treatments that had no manure applied for up to 12 years consistently had the lowest yields. In spring barley, the two treatments with manure and with catch crops consistently had the highest yields. In... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Weed management. |
| Ano: 2009 |
URL: http://orgprints.org/18379/1/18379a.pdf |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| Rasmussen, Ilse A.. |
| A series of field experiments were carried out in winter wheat grown under organic conditions in Denmark on fields with different weed pressure. The treatments were sowing strategy (normal sowing time, late sowing and false seedbed), row distance (12 cm and 24 cm row distance) and weed control method (untreated, mechanical weed control (weed harrowing at 12 cm supplemented with row hoeing at 24 cm), and herbicide weed control). Weed biomass was largest at the normal sowing time and was reduced by mechanical or chemical weed control. Row distance alone did not generally influence weed biomass, but mechanical weed control reduced weed biomass at a row distance of 24 cm. Normal sowing time gave rise to about 10% higher yield. The effect of weed control on... |
| Tipo: Journal paper |
Palavras-chave: Weed management Crop husbandry Cereals; Pulses and oilseeds. |
| Ano: 2002 |
URL: http://orgprints.org/215/1/vihveart_wr_rev.doc |
| |
|
|
| Melander, Bo; Rasmussen, Ilse A.; Olesen, Jørgen E.. |
| Fertility building measures are important components in improving the productivity of organic cropping systems without livestock. However, some measures seem to be incompatible with the control of perennial weeds that can have adverse effects such as significant weed competition. The influence of fertility building measures (N2-fixing crops in the crop sequence, cover crops and manuring) and the abundance of perennial weeds were studied in a long-term crop rotation experiment at two locations in Denmark. The aim was to gain insight into the factors that influence the growth of perennial weed species occurring in mixed stands. Data were obtained from three cycles of four-year arable crop rotations comprising various cash crops in rotations with and... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2016 |
URL: http://orgprints.org/29791/1/Published_paper.pdf |
| |
|
|
| Rasmussen, Ilse A.. |
| The aim of this review is to provide an overview of weed control methods available for organic farming systems based on research mainly from Europe and North America, but measures mentioned here are not necessarily allowed in organic farming. Biological control of weeds is not considered in this review. |
| Tipo: Book chapter |
Palavras-chave: Weed management. |
| Ano: 2004 |
URL: http://orgprints.org/3937/1/3937.pdf |
| |
|
|
| Rasmussen, Ilse A.; Rasmussen, Karsten. |
| Der er udført forsøg to steder i to år med rullestjernerenseren i kartofler. Formålet har været at finde det mindste antal behandlinger for at minimere afgrødeskade og maximere effekten på både enårigt og flerårigt ukrudt. Behandlingerne blev udført på ukrudtets trådstadie, kimbladsstadie eller løvbladstadie. Det tilsvarende antal behandlinger var 4 eller 6, 2 eller 3 og 1 eller 2. Effekten på biomasse af enårigt ukrudt var over 80% med en overkørsel og over 90% med to. Effekten på biomasse af flerårigt ukrudt var over 50% med mere end en overkørsel. Kun i ét forsøg blev udbyttet reduceret (ca. 10%) ved mekanisk bekæmpelse sammenlignet med kemisk, mens der var 50% udbyttetab i de ubehandlede parceller. Flere behandlinger havde en tendens til at reducere... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Root crops; Weed management. |
| Ano: 2003 |
URL: http://orgprints.org/1509/1/PVKkartofler_2003.pdf |
| |
|
|
| Rasmussen, Ilse A.; Askegaard, Margrethe; Olesen, Jørgen E.. |
| In long-term organic crop rotation experiments for cereal production, stubble cultivation to control perennial weeds increased nitrogen leaching compared to catch crops grown after harvest. Stubble cultivation contributed to the control of Elymus repens on a sandy soil, but not to the control of Cirsium arvense on a loamy soil. Manure application had a tendency to decrease E. repens density in one rotation at the sandy soil. Grass-clover green manure decreased C. arvense in the succeeding crops. Despite high infestations of perennial weeds, yields were at the same level with as without stubble cultivation. The results point to an important dilemma in organic farming: should the farmer control perennial weeds in the stubble at the expense of losing nitrogen... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Specific methods. |
| Ano: 2005 |
URL: http://orgprints.org/4451/4/Rasmussen_etal_4p_revised%2Ded.doc |
| |
|
|
| 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 |
| |
|
| |
| Registros recuperados: 117 | |
|
|
|
