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| Registros recuperados: 19 | |
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| Melander, B.; Olesen, J.E.. |
| Weed problems can constrain organic crop production resulting in significant losses in yield and quality. Especially perennial weed species such as Elytrigia repens, Cirsium arvense and Tussilago farfara are posing problems as arable cropping systems do not hamper their vegetative proliferation sufficiently. Annual weeds may also reach unacceptable infestation levels leaving the growers with poor yielding crops and severe future weed problems owing to the shedding and spread of weed seeds. Effective weed management is a key component for successful organic crop production and a prerequisite to increase the yielding potential of many organic crop production systems. Weed problems are most severe on stockless arable farms because the supply of nutrients can... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions; Weed management. |
| Ano: 2013 |
URL: http://orgprints.org/24550/1/24550.pdf |
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| Jørgensen, M.H.; Kristensen, E.F.; Kristensen, J.K.; Melander, B.. |
| Surface steaming of soil is a very energy-intensive process, and consequently, efforts have been made to develop a machine for narrow-band steaming of the soil under and around rows of cultivated plants prior to seeding. The use of this machine may achieve up to 90% energy savings, and will also reduce the amount of damage to the flora and fauna. A special test rig has been developed with the objective of obtaining new information about narrow-band soil steaming. For a detailed analysis of the temperature profile in a cross-section of the processed band, an apparatus has been developed especially to record the temperatures obtained at 63 locations and at seven levels across the ditch. On the basis of the results from the test rig, a prototype band-steamer... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Weed management Vegetables Denmark. |
| Ano: 2004 |
URL: http://orgprints.org/4807/1/4807.pdf |
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| BRANDSÆTER, L.O.; FOGELFORS, H.; FYKSE, H.; Graglia, E.; JENSEN, R.K.; Melander, B.; Salonen, J.; Vanhala, P.. |
| The success of weed management aimed at depleting the regenerative structures of perennial weeds depends largely on the sprouting activity of rhizome and root buds. Seasonal variation in sprouting of these buds on Cirsium arvense, Sonchus arvensis and Elymus repens was studied for plants collected from Denmark, Finland, Norway and Sweden. At 2-week intervals from July to October, 5-cm fragments of roots or rhizomes were cutfrom plantsgrown in buckets and planted into soil in pots, half of which were placed immediately into growth chambers at 18�C for 4 weeks. The other half of the pots were initially placed in a dark room at 2�C for 4 weeks before being transferred to the same growth chamber, also for 4 weeks. During the growth chamber period, the numbers... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2010 |
URL: http://orgprints.org/17900/1/17900.pdf |
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| Melander, B.; Kristensen, J.K.; Kristensen, K.; Mathiassen, S.K.; Nørremark, M.; Kristensen , E.F.. |
| Traditional strategies for controlling Elytrigia repens infestations in organic cropping in Scandinavia are based on repeated post-harvest cultivation. However, post-harvest tillage is undesirable due to the need for retaining nutrients in the cropping systems. There is a need to look for solutions where E. repens can be controlled over a short duration to allow replanting of the soil. A Danish project is investigating new technologies that can meet such requirements. One aspect is to look for methods that physically can destruct the sprouting ability of E. repens rhizome buds. We investigated the effect of heating using hot water and mechanical crushing by pressure on the sprouting ability of exposed rhizome buds. The effect of temperatures < 70oC... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2010 |
URL: http://orgprints.org/17901/1/17901.pdf |
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| Melander, B.; Kristensen, J.K.; Kristensen, K.; Mathiassen, S.K.; Nørremark, M.; Kristensen , E.F.. |
| Traditional strategies for controlling Elytrigia repens infestations in organic cropping in Scandinavia are based on repeated post-harvest cultivation. However, post-harvest tillage is undesirable due to the need for retaining nutrients in the cropping systems. There is a need to look for solutions where E. repens can be controlled over a short duration to allow replanting of the soil. A Danish project is investigating new technologies that can meet such requirements. One aspect is to look for methods that physically can destruct the sprouting ability of E. repens rhizome buds. We investigated the effect of heating using hot water and mechanical crushing by pressure on the sprouting ability of exposed rhizome buds. The effect of temperatures <... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2011 |
URL: http://orgprints.org/20606/1/20606a.pdf |
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| Tørresen, K.S.; Salonen, J.; Fogelfors, H.; Håkansson, S.; Melander, B.. |
| There is an increasing use of various forms of reduced tillage or no-tillage in the Nordic countries. This will favour the growth of grass weed species and perennial species. Perennial creeping weeds like Elymus repens, Cirsium arvense, and Sonchus arvensis are important in all Nordic countries. Stationary weeds such as Taraxacum spp., Artemisia vulgaris and volunteer grassland species increase in areas with reduced tillage and especially no-tillage systems. Winter annual and biennial species such as Matricaria perforata, Poa annua, Alopecurus geniculatus and Stellaria media are frequently occuring weeds in reduced tillage systems in all countries, while Alopecurus myosuroides and Apera spica-venti are problems in Denmark and Southern parts of Sweden and... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2006 |
URL: http://orgprints.org/16327/1/tillagee.pdf |
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| Rasmussen, I.A.; Bastiaans, L.; Holst, N.; Grundy, A.; Melander, B.. |
| A three-day workshop on modelling weed population dynamics partially sponsored by the European Weed Research Society (EWRS) was held in October 2006 at Research Centre Flakkebjerg. 24 participants attended the workshop from 8 countries, mainly Europe and USA. The aim of the workshop was to gather some of those active and interested in the field, i.e. most of the participants had either published papers on weed population dynamic models or had a model under development. By gathering these people, it was our hope to learn from each other and possibly benefit by increasing the knowledge and use of each other's work. The EWRS saw the workshop as an opportunity to interconnect some of the work going on in (at least) three working groups: Weed Seed Germination... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2007 |
URL: http://orgprints.org/11348/1/WeedDynamics_keynote_Rasmussen_rev2.doc |
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| van der Weide, R.Y.; Bleeker, P.O.; Achten, V.T.J.M.; Plotz, L.A.; Fogelberg, F.; Melander, B.. |
| Weed control within crop rows is one of the main problems in organic farming. For centuries, different weed removal tools have been used to reduce weeds in the crop rows. Stimulated by the demand from organic farmers, research in several European countries over the last decade has focused on mechanisation using harrowing, torsion finger weeding and weeding with compressed air (Pneumat). Intelligent weeders are now being developed which offer more advanced ways to control weeds, including larger ones and to leave the crop plants unharmed. One of the first commercially available intelligent weeders, the Sarl Radis from France, has a simple crop detection system based on light interception, which guides a hoe in and out of the crop row, around the crop... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2008 |
URL: http://orgprints.org/14699/1/14699.pdf |
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| Rasmussen, I.A.; Bastiaans, L.; Holst, N.; Grundy, A.; Melander, B.. |
| A three-day workshop on modelling weed population dynamics partially sponsored by the European Weed Research Society (EWRS) was held in October 2006 at Research Centre Flakkebjerg. 24 participants attended the workshop from 8 countries, mainly Europe and USA. The aim of the workshop was to gather some of those active and interested in the field, i.e. most of the participants had either published papers on weed population dynamic models or had a model under development. By gathering these people, it was our hope to learn from each other and possibly benefit by increasing the knowledge and use of each other's work. The EWRS saw the workshop as an opportunity to interconnect some of the work going on in (at least) three working groups: Weed Seed Germination... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2007 |
URL: http://orgprints.org/11347/1/Ilse_Rasmussen%2D06%2D02.doc |
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| Schjønning, P.; Jørgensen, M.H.; Olesen, J.E.; Rasmussen, G.; Munkholm, L.J.; Melander, B.. |
| Der er fra det danske landbrugserhverv formuleret ønske om, at der iværksættes en bedre rådgivning omkring gennemførelse af reduceret jordbearbejdning, herunder direkte såning (FRDK, bl.a. ved mødet i Forskningskontoret 18. januar 2001). Problemstillingen har interesse for såvel konventionelle som økologiske jordbrugere, idet reduceret bearbejdning af jorden som udgangspunkt er positivt for jordkvaliteten. Der er gennemført en lang række undersøgelser omkring reduceret jordbearbejdning og direkte såning i Danmark. En række forhold har dog til dels gjort disse resultater forældede. Det skyldes bl.a. den politisk bestemte udvikling i de dyrkede afgrøder, herunder i særlig grad sædskiftet, som har stor betydning for reduceret jordbearbejdning. De gennemførte... |
| Tipo: Report |
Palavras-chave: Production systems; Soil tillage; Farming Systems; Soil. |
| Ano: 2001 |
URL: http://orgprints.org/730/1/redj_not.doc |
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| Cirujeda, A.; Melander, B.; Rasmussen, K.; Rasmussen, I.A.. |
| Field trials were made at a single Danish and two Spanish locations. In Denmark winter wheat was sown at 24 cm spacing allowing hoeing in the inter-row area. Hoeing speeds of 2, 5 and 8 km h-1 were tested at the end of tillering, at the beginning of stem elongation and at both times. The crop was harrowed immediately afterwards at the same speed. In the Spanish locations the winter barley was sown at a spacing of 12 cm and harrowed only at either pre-emergence plus post-emergence or once post-emergence at mid-tillering at 2, 4, 6 and 8 km h-1. The depth of the soil layer thrown into the cereal row was measured. This layer ranged between 0.4 cm and 1.4 cm depending on the site and on the treatment, but was generally higher with a single treatment at all... |
| Tipo: Journal paper |
Palavras-chave: Weed management Cereals; Pulses and oilseeds. |
| Ano: 2003 |
URL: http://orgprints.org/1521/1/WR_Cirujedaetal.pdf |
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| Noe, E.; Sørensen, P.; Melander, B.; Olesen, J.E.; Fog, E.. |
| There is a gap between the scientific idea of robust and economically viable organic arable farming systems with optimized crop rotations for nutrient and pest management and how these systems look like in practice. In order to explore this gap, we visited and interviewed ten organic arable farms in Denmark. Our main findings are: 1) Organic arable farming operates in a very dynamic and changing environment in terms of prizing and market opportunities, and the main focus of the farm managements was the coping strategy within this changing environment; 2) The farming systems were continuously changing and developing, buying and renting more land, changing manure agreements and other forms of cooperation and arrangements; 3) Short term profit was paid much... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Markets and trade; Research communication and quality. |
| Ano: 2013 |
URL: http://orgprints.org/24578/1/24578.pdf |
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| Jørgensen, M.H.; Kristensen, J.K.; Melander, B.; Kristensen, E.F.. |
| For many years, disinfection of the soil by means of steaming has been a common method for eliminating weeds and fungal diseases. However, surface steaming of soil is a very energy-intensive process, and consequently, efforts have been made to develop a machine for narrow-band steaming of the soil under and around rows of cultivated plants prior to seeding. The use of this machine may achieve up to 90% energy savings, and will also reduce the amount of damage to the flora and fauna. A special test rig has been developed with the objective of obtaining new information about narrow-band soil steaming. The test rig consists of a revolving ditch, in which the soil can be heated by means of submerged steam jets. The rig is equipped with thermosensors for... |
| Tipo: Journal paper |
Palavras-chave: Weed management; Buildings and machinery; Denmark. |
| Ano: 2004 |
URL: http://orgprints.org/4822/1/4822.pdf |
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| Melander, B.; Jørgensen, M.H.. |
| Steaming the soil prior to crop establishment can be a very effective method of preventing weed seedling emergence on raised beds in vegetable cropping. However, current mobile steaming technology for outdoor vegetables is characterised by an extremely high energy consumption and a low work rate. This has led to the concept of band-steaming, where only a limited soil volume is steamed corresponding to the intrarow area of a row grown vegetables crop. Weeds growing in the intrarow area are troublesome to remove by traditional non-chemical means, usually involving substantial input of manual labour in organic cropping. This paper presents the first results from laboratory studies with steaming a limited soil volume simulating a band. The investigations aimed... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2005 |
URL: http://orgprints.org/2626/1/2626.pdf |
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| Registros recuperados: 19 | |
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