Results 281 to 290 of about 122,455 (308)

Selecting a Sampling Method for Weed Densities: The Case of Weed Removal in Strips

Weed Science, 1995
When a range of weed densities is needed for competition experiments, one method of reducing existing populations is to remove all weeds in strips of specified length down the crop row. This technique also can be used to create different sizes of weed dusters.
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Annual weed competition in wheat crops: the effect of weed density and applied nitrogen

Weed Research, 1979
Summary:Experiments investigating the effect of weed density on the yjeld of a wheat crop at three levels of applied nitrogen were conducted in north‐western Victoria. Australia, during 1970. There were five sites, each infested with a pure stand of one of the following annual broad‐leaved weed species: Lithospermum arvense, Brassica tournifortii ...
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Effect of stale seedbed preparations and subsequent weed control in lettuce (cv. Iceboll) on weed densities

Weed Research, 2007
SummaryThe effects of stale seedbed preparations and several weed control methods on the emergence of weeds in lettuce were studied. The specific goal was to evaluate the use of a stale seedbed in combination with chemical or mechanical weed control methods in the field.
Riemens, M.M., van der Weide, R.Y., Bleeker, P.O., Lotz, L.A.P.   +3 more
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Effects of Weed Density on Herbicide Absorption and Bioactivity

Weed Science, 1981
The effects of weed density on the phytotoxicity of atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] to white mustard (Brassica hirtaMoench) and alachlor [2-chloro-2′,6′-diethyl-N-(methoxymethyl)acetanilide] to foxtail millet [Setaria italica(L.) Beauv.] were determined in the greenhouse.
M. E. Winkle, J. R. C. Leavitt, O. C. Burnside   +2 more
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Effect of Crop Density on Weed Interference in Maize

Agronomy Journal, 1994
AbstractDevelopment of an integrated weed management system requires detailed information on crop‐weed interactions, including the impact of the relative competitive ability of the crop during various phases of development on weed growth. The objective of this study was to quantify effects of maize (Zea mays L.) plant density on weed interference in ...
M. Tollenaar, A. A. Dibo, A. Aguilera, S. F. Weise, C. J. Swanton   +4 more
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Weed population dynamics in maize crop characterized by high and low weed density

2008
the aim of this work was to assess in maize crop, managed with high and low levels of agricultural input, the variation of weed population ...
Graziani F., PANNACCI, Euro, Covarelli G.   +2 more
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Cultural Strategies Reduce Weed Densities in Summer Annual Crops

Weed Technology, 1999
Producers in the central Great Plains are seeking alternative strategies to manage weeds because of herbicide resistance, narrow profit margins, and a lack of registered herbicides in some crops. Thus, we evaluated the impact of cultural systems in winter wheat and tillage on weed dynamics in corn, sunflower, and proso millet planted the year following
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A simple model relating yield loss to weed density

Annals of Applied Biology, 1985
SUMMARYA simple model is developed to describe crop yield loss as a function of weed density. The model, a rectangular hyperbola, has two agronomically meaningful parameters which together can be used as indices of competitiveness. Examples are given where the model is fitted to experiments from the literature.
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Weed Density and Distribution Estimation for Precision Agriculture Using Semi-Supervised Learning

IEEE Access, 2021
Shantam Shorewala, Sidharth Ramesh, Ujjwal Verma   +2 more
exaly  

Impact of High Density Planting and Weed Management Practices on Weed Density, Weed Drymatter and Yield of Bt Cotton

International Journal of Pure & Applied Bioscience, 2017
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