Weed Community Response to Crop Rotations in Western South Dakota
- 1 March 2007
- journal article
- Published by Cambridge University Press (CUP) in Weed Technology
- Vol. 21 (1), 131-135
- https://doi.org/10.1614/wt-06-011.1
Abstract
Producers in the semiarid Great Plains are exploring alternative crop rotations, with the goal of replacing winter wheat–fallow. In 1993, a study was established to compare performance of eight rotations comprised of various combinations with winter wheat (W), spring wheat (SW), dry pea (Pea), safflower (Saf), corn (C), sunflower (Sun), proso millet (M), or fallow (F). After 8 years, we characterized weed communities by recording seedling emergence in each rotation. Seventeen species were observed, with downy brome, kochia, horseweed, and stinkgrass comprising 87% of the community. Rotations with the least number of weed seedlings were W–F and SW–W–C–Sun; in comparison, weed density was six-fold higher in W–M. Density of downy brome and kochia was highest in W–M compared with other rotations, whereas stinkgrass and green foxtail were prominent in proso millet of the W–M and W–C–M rotations. Horseweed established readily in safflower and dry pea. In the semiarid Great Plains, designing rotations in a cycle of four that includes cool- and warm-season crops can be a key component of integrated weed management.Keywords
This publication has 16 references indexed in Scilit:
- A Multi‐Tactic Approach to Manage Weed Population Dynamics in Crop RotationsAgronomy Journal, 2005
- Weed Dynamics and Management Strategies for Cropping Systems in the Northern Great PlainsAgronomy Journal, 2002
- Weed communities associated with arable Saskatchewan farm management systemsCanadian Journal of Plant Science, 2000
- Alternative Crop Rotations for the Central Great PlainsJournal of Production Agriculture, 1999
- Soil Organic Matter Changes in Intensively Cropped Dryland SystemsSoil Science Society of America Journal, 1999
- Dryland Cropping Intensification: A Fundamental Solution to Efficient Use of PrecipitationAdvances in Agronomy, 1998
- Integrated Pest Management of Insects, Plant Pathogens, and Weeds in Dryland Cropping Systems of the Great PlainsJournal of Production Agriculture, 1996
- Precipitation Use Efficiency as Affected by Cropping and Tillage SystemsJournal of Production Agriculture, 1996
- Prediction of weed seedling densities from buried seed reservesWeed Research, 1992
- Numerical Methods Illustrating the Phytosociology of Crops in Relation to Weed FloraJournal of Applied Ecology, 1979