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Thermal Band Heating for Intra-Row Weed Control

Jørgensen, M.H.; Kristensen, J.K.; Melander, B. and Kristensen, E.F. (2004) Thermal Band Heating for Intra-Row Weed Control. Not submitted. [Completed]

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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 measuring temperatures in the steamed band during the process. For a more 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 for field use has been developed. Tests have shown that soil temperatures exceeding 70C will be needed to protect against germination of weed seeds. For band heating such a treatment in 50 cm rows requires about 5.8 GJ/ha.

EPrint Type:Journal paper
Keywords:weed control, germination, steam, energy, soil, horticulture, agriculture
Subjects: Crop husbandry > Weed management
Farming Systems > Buildings and machinery
"Organics" in general > Countries and regions > Denmark
Research affiliation: Denmark > DARCOF II (2000-2005) > I. 9 (BANHEAT) Band heating for intra-row weed control
Deposited By: Kristensen, Erik Fløjgaard
ID Code:4822
Deposited On:20 May 2005
Last Modified:12 Aug 2012 07:50
Document Language:English
Refereed:Not peer-reviewed

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