Results 231 to 240 of about 14,595 (259)

Separating the effects of crop rotation from weed management on weed density and diversity

Weed Science, 1999
Crop 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, Susan E. Weaver, Allan S. Hamill, Jianhua Zhang   +3 more
openaire   +1 more source

Effects of Crop and Weed Management on Density and Vertical Distribution of Weed Seeds in Soil

Agronomy Journal, 1998
AbstractCultural practices used for crop management can influence numbers of weed seeds in the soil seed bank. This paper reports results of field experiments conducted for 6 yr to examine changes in weed seed numbers due to management practices. We evaluated the effect of tillage, herbicide application, and interrow cultivation on weed seed numbers in
Melinda L. Hoffman, Micheal D. K. Owen, Douglas D. Buhler   +2 more
openaire   +1 more source

Planting density on weed suppression and yield of okra

International Journal of Vegetable Science, 2020
Planting density affects the level of competition for resources needed for the growth and production of okra (Abelmoschus esculentus [L.] Moench). Competition from weeds can affect yield.
E. A. Makinde, O. R. Adeyemi, O. M. Odeyemi, A. W. Salau, O. L. Abiodun   +4 more
openaire   +1 more source

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
openaire   +1 more source

Predicting the competitive effects of weed and crop density on weed biomass, weed seed production and crop yield in wheat

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, K. J. WRIGHT, P. BRAIN, M. CLEMENTS, E. STEPHENS   +4 more
openaire   +1 more source

A Single-Time Survey Method to Predict the Daily Weed Density for Weed Control Decision-Making

Weed Science, 2011
Decision-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, Vasileiadis VP, Loddo D, Otto S, Zanin G   +4 more
openaire   +3 more sources

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
openaire   +1 more source

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 ...
openaire   +1 more source

Integrated weed management practices in gladiolus and their effect on flowering, weed density and corm yield

Indian Journal of Horticulture, 2016
An experiment was during Rabi (winter) season of 2014–15 to study on integrated weed management in gladiolus cv. Pusa Srijana. A set of 11 integrated weed management treatments laid out in simple randomized block design with three replications. The results revealed that the number of monocot and dicot weeds, their fresh and dry weight was recorded ...
Sunita Dhakar, K. Swaroop, Kanwar P. Singh, T.K. Das, Prabhat Kumar, Naveen Singh   +5 more
openaire   +1 more source

The influence of an ecological and a low input system on weed density, weed diversity and weed competition in spring barley

2008
The field trial was carried out over the period 2000-2005 at the experimental station of the Research Institute of Plant Production in Western Slovakia. The purpose of the study was to investigate weed density and diversity and the ability of spring barley to compete in ecological and low input systems in a six years crop rotation system.
Macák, M., Žák, Š., Đalović, Ivica, Szombathová, N.   +3 more
openaire   +1 more source