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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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| 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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| Melander, Bo; Kristensen, J.K.. |
| Soil steaming applied in bands is a new technology with the potential to radically lower the burden of hand-weeding intra-row weeds in non-herbicidalvegetable cropping. Preliminary studies with band-steaming have shown effective control of viable weed seeds when the maximum soil temperatures reach 60–80◦C. This temperature range has a particular agronomic interest,and the present study aimed at investigating the influence of soil factors and heat duration on weed seed mortality of soil steaming targeting 60–80◦C. Two soil types (sand versus sandy loam) and two moisture levels (moist versus dry) were studied in one experiment (expt) while two levels of structure of a sandy loam (coarse versus fine) were included in a second experiment. A third experiment... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2011 |
URL: http://orgprints.org/20604/4/20604.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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