Results 271 to 280 of about 122,455 (308)
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Modelling the effects of herbicide dose and weed density on rice‐weed competition
Weed Research, 2014SummaryThe effects of herbicide dose on rice‐weed competition were investigated to develop a combined model, which can be utilised to estimate an optimum herbicide dose for a given weed density in paddy rice cultivation. Field studies were conducted in Suwon for rice‐Echinochloa crus‐galli competition and Iksan for rice‐Eleocharis kuroguwai during 2007.
B C Moon +5 more
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Precision weed control robot for vegetable fields with high crop and weed densities
2019 Boston, Massachusetts July 7- July 10, 2019, 2019Abstract. Weeds growing in close proximity to the seedline area are highly competitive for resources needed by crop plants and causes a reduction in crop productivity if left uncontrolled. A method to automate the weed removal process, which is currently a costly manual operation, is in high demand by vegetable growers.
Rekha Rajaa +3 more
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Weed Density Around MacMillian Building
2010Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC.
Nugent, Michael R +2 more
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Level of threshold weed density does not affect the long-term frequency of weed control
Crop Protection, 1997Abstract Weed control thresholds are often presented as a means to reduce unnecessary control measures, thereby increasing the effectiveness of weed management. While the threshold is a useful tool for cost-effective application of control on a single-year base, its role over the longer term is more complicated. It is shown that long-term application
Wallinga, J., van Oijen, M.
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Analysis of sampling precision in low-density weed populations
Precision Agriculture, 2021Site-specific weed management (SSWM) can provide significant herbicide savings but requires the reliable detection of weed populations. In this work, the effect of sample size on sampling precision was studied in four sub-field areas of winter cereals infested with Galium aparine.
Pavel Hamouz, Kateřina Hamouzová
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Separating the effects of crop rotation from weed management on weed density and diversity
Weed Science, 1999Crop rotation is thought to reduce weed density and maintain species diversity, thus preventing the domination of a few problem weeds. Because cropping sequence dictates other agricultural management practices, variations in weed populations between cropping systems may be the direct result of crop rotation, the result of different weed management ...
Colleen Doucet +3 more
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A Single-Time Survey Method to Predict the Daily Weed Density for Weed Control Decision-Making
Weed Science, 2011Decision-making processes must indicate if, how, and when weed control should be practiced. So far, Decision Support Systems (DSSs) for weed control to prevent crop yield losses can guide decisions on “if” and “how.” Experience shows that farmers need a DSS that can also guide when to treat, but this can only be done if the actual weed density observed
Masin R +4 more
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2019 Boston, Massachusetts July 7- July 10, 2019, 2019
Abstract. This paper presents a novel technique to crop signaling to classify weed and crop for robotic weed control for leafy vegetables. It is a big challenge to classify weeds from the crop plants in a field with high weed densities in the process of automatic weed control due to the high levels of visual occlusion that impair visibility.
R Raja +2 more
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Abstract. This paper presents a novel technique to crop signaling to classify weed and crop for robotic weed control for leafy vegetables. It is a big challenge to classify weeds from the crop plants in a field with high weed densities in the process of automatic weed control due to the high levels of visual occlusion that impair visibility.
R Raja +2 more
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A Real-Time Specific Weed Recognition System by Measuring Weeds Density through Mask Operation
2008The identification and classification of weeds are of major technical and economical importance in the agricultural industry. To automate these activities, like in shape, color and texture, weed control system is feasible. The goal of this paper is to build a real-time, machine vision weed control system that can detect weed locations.
Imran Ahmed +3 more
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Weed Research, 1995
SummaryCompetition between winter‐sown wheat and Viola arvensis Murray or Papaver rhoeas L. was studied in two experiments in two successive years. The effects of varying crop and weed density were modelled in terms of weed biomass over time, weed seed production and crop yield. Biomass model parameters, representing maximum weed biomass and intra‐ and
B. J. WILSON +4 more
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SummaryCompetition between winter‐sown wheat and Viola arvensis Murray or Papaver rhoeas L. was studied in two experiments in two successive years. The effects of varying crop and weed density were modelled in terms of weed biomass over time, weed seed production and crop yield. Biomass model parameters, representing maximum weed biomass and intra‐ and
B. J. WILSON +4 more
openaire +1 more source