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| Registros recuperados: 12 | |
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| Griepentrog, Hans W.; Nørremark, Michael. |
| Individual plant care in agriculture will lead to new opportunities in crop management. Not only the weeding operation is in focus here but it will be more in general for individual chemical or physical treatments of individual weed or crop plants. For the application of fertilizers and chemicals in small dose rates and accurately targeted advanced sensor information e.g. based on spectral responses can be used to consider the individual plant needs ('the speaking plant'). This will have a significant effect on the reduction of inputs and increase the general efficiency rates of agricultural means. The objective of this project was to provide high accuracy seed position mapping of a field of sugar beet to allow subsequent physical weeding as inter- and... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2004 |
URL: http://orgprints.org/4835/1/4835.pdf |
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| Rasmussen, Jesper; Henriksen, Christian Bugge; Griepentrog, Hans W.; Nielsen, Jon. |
| Punch planting has recently been suggested to reduce intra-row weeds in organically grown row crops. In this method holes are punched in the ground with a minimum of soil disturbance and seeds are inserted into them, without soil disturbance outside the hole. The first experiments with a tractor-mounted prototype of a dibber drill (MK III) are presented here. In two years, three plant establishment procedures were compared at five different sowing dates in sugar beet and direct-sown onion. The plant establishment procedures were 1) normal sowing and mechanical control of weeds in the stale seedbed (N), 2) N + pre-emergence flame weeding (N+F), and 3) punch planting and flame weeding to control weeds in the seedbed and prior to crop emergence (P +F). The... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2010 |
URL: http://orgprints.org/17904/1/17904.pdf |
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| Nørremark, Michael; Griepentrog, Hans W.. |
| In this project a Real Time Kinematic Global Position System (RTKGPS) was used to provide high accuracy field operation data. The deviations and errors of the RTKGPS when used in static and dynamic modes were studied as well as the accuracy of RTK GPS in eastern Denmark (55 40 N, 12 18 E) during a 24-hour test. The project introduced a novel real time data acquisition system and post-processing algorithms for improving positioning by merging RTKGPS data with vehicle altitude. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2003 |
URL: http://orgprints.org/4837/1/4837.pdf |
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| Rasmussen, Jesper; Griepentrog, Hans W.; Nielsen, J.; Henriksen, Christian Bugge. |
| There is much emphasis on technical aspects related to sensor or mapping techniques, which enable so-called intelligent cultivators to target the intra-row spaces within crop rows. This study investigates (i) an expected advantage of an intelligent rotor tine cultivator (the cycloid hoe) in terms of crop-weed selectivity and (ii) an expected synergistic effect between punch planting and post-emergence weed harrowing in terms of improved crop-weed selectivity. Selectivity is defined as the relationship between weed control and associated crop density decline one week after cultivation, and punch planting is a sowing technique where holes are created in the ground with a minimum of soil disturbance and seeds are inserted into them, without soil disturbance... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2012 |
URL: http://orgprints.org/20603/2/20603.pdf |
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| Rasmussen, Jesper; Griepentrog, Hans W.; Nielsen, J.; Henriksen, Christian Bugge. |
| There is much emphasis on technical aspects related to sensor or mapping techniques, which enable so-called intelligent cultivators to target the intra-row spaces within crop rows. This study investigates (i) an expected advantage of an intelligent rotor tine cultivator (the cycloid hoe) in terms of crop-weed selectivity and (ii) an expected synergistic effect between punch planting and post-emergence weed harrowing in terms of improved crop-weed selectivity. Selectivity is defined as the relationship between weed control and associated crop density decline one week after cultivation, and punch planting is a sowing technique where holes are created in the ground with a minimum of soil disturbance and seeds are inserted into them, without soil disturbance... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2012 |
URL: http://orgprints.org/21136/8/21136.pdf |
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| Rasmussen, Jesper; Henriksen, Christian Bugge; Griepentrog, Hans W.. |
| Experiences with a punch planter and an intelligent rotary tine weeder are summarized. The objectives were to investigate (1) to what extent punch planting and pre-emergence flame weeding can reduce intra-row weed emergence in direct sown crops like onion, carrot and sugar beet, (2) to what extent an intelligent intra-row weeder, a cycloid hoe based on RTK-GPS technology, can control intra-row weeds without damaging the crop in direct sown crops, (3) and to what extent there exists synergy between punch planting with pre-emergence flame weeding and mechanical intra-row weeding. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2011 |
URL: http://orgprints.org/18777/1/18777.pdf |
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| Griepentrog, Hans W.; Nørremark, Michael; Nielsen, Henning; Blackmore, Simon. |
| Individual plant care may well become embodied in precision farming in the future and will lead to new opportunities in agricultural crop management. The objective of this project was to develop and evaluate a data logging system attached to a precision seeder to enable high accuracy seed position mapping of a field of sugar beet. A Real Time Kinematic Global Positioning System (RTK GPS), optical seed detectors and a data logging system were retrofitted on to a precision seeder to map the seeds as they were planted. The average error between the seed map and the actual plant map was about 16–43 mm depending on vehicle speed and seed spacing. The results showed that the overall accuracy of the estimated plant positions was acceptable for the guidance of... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2005 |
URL: http://orgprints.org/4831/1/4831.pdf |
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| Nørremark, Michael; Griepentrog, Hans W.. |
| The objective of this paper is to analyse and define the field conditions close to the crop plants of sugar beet (Beta vulgaris L.). The aim is to use this study for the choice and development of new physical weeding methods to target weeds at individual plant scale level. It was found that the close to crop area is like a ring structure, comprising an area between an inner- and outer-circle around the sugar beet seedling. Physical weeding should not be applied to the area within the inner circle. The radius of the inner circle increases with the appearance of young beet leaves during the growth season. It was also found, that no weeds were germinating within 1 cm around individual sugar beet seedlings. Therefore this distance should be added to the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2004 |
URL: http://orgprints.org/4834/1/4834.pdf |
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| Griepentrog, Hans W.; Nørremark, Michael; Nielsen, Henning; Blackmore, Simon. |
| Individual plant care cropping systems, embodied in precision farming, may lead to new opportunities in agricultural crop management. The objective of the project was to provide high accuracy seed position mapping of a field of sugar beet. An RTK GPS was retrofitted on to a precision seeder to map the seeds as they were planted. The average error between the seed map and the actual plant map was about 32 mm to 59 mm. The results showed that the overall accuracy of the estimated plant positions is acceptable for the guidance of vehicles and implements. For subsequent individual plant care, the deviations were not, in all cases, small enough to ensure accurate individual plant targeting. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2003 |
URL: http://orgprints.org/4836/1/4836.pdf |
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| Griepentrog, Hans W.; Nørremark, Michael. |
| Mulighederne indenfor præcisionsjordbrug er i de seneste år blevet mangfoldige. Præcisionsjordbrug har hidtil været anvendt på markniveau til graduering af forskellige produktionsmidler. Dette kan have en miljøforbedrende effekt både mht. udvaskning af nærringssalte og pesticider. Det overordnede mål har derved været at forøge effektiviteten af det enkelte produktionsmiddel. I den sammenhæng er det interessant at undersøge mulighederne for at forøge effektiviteten af det enkelte produktionsmiddel ved direkte at tilføre midlet til hver enkel kulturplante. Problemstillingen er derfor at udvikle teknologi, som gør det muligt at positionsbestemme hver enkel kulturplante på en mark. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2002 |
URL: http://orgprints.org/4833/1/4833.pdf |
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| Registros recuperados: 12 | |
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