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S. Alan Walters and Elizabeth A. Wahle

these plants negates the benefit of crop rotation ( Bratsch, 2006 ); a 3- to 4-year crop rotational scheme without volunteer horseradish is important for reducing internal root discoloration [IRD (covered in the disease section)] in subsequent

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Cary L. Rivard and Frank J. Louws

al., 2006 ). Bacterial wilt caused by Ralstonia solanacearum is problematic in many southeastern U.S. crops, including tomato, potato, tobacco, and eggplant. Control of BW in tomato is very difficult. Crop rotation with a nonhost crop may provide

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Laura Pickett Pottorff and Karen L. Panter

planting in disease- or insect-infested soil should be avoided. To minimize the buildup of soilborne pathogens, appropriate crop rotations should be practiced. Alternatively, if soil is infested with pathogens, soil solarization can be used, especially in

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Guangyao Wang, Mathieu Ngouajio and Darryl D. Warncke

matter and nutrient content of these soils help produce high-quality vegetables. Therefore, commercial onion production in Michigan is conducted under intensive systems with short-term crop rotations. Many onion growers use a 2- to 3-year rotation with

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transition back into society. Bulb Fennel Variety Trial in the Northwestern U.S. Bulb fennel is a promising alternative crop for growers in northwestern Washington, as it is well suited to the region’s environment, has a high market value, and it fills a crop

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Jialin Yu, Nathan S. Boyd and Zhengfei Guan

.) in winter wheat ( Triticum aestivum L.) include growing a spring wheat crop in the crop rotation to reduce the soil weed seedbank ( Walenta et al., 2002 ). Previous studies of the impacts of crop diversity on weed population dynamics have focused on

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Stephen R. King, Angela R. Davis, Wenge Liu and Amnon Levi

production in the United States is much more extensive than in other parts of the world such as Asia and Europe. Because of this, crop rotation, even fallowing land for extensive periods, has been feasible. Crop rotations have proven to be an effective

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Sharon J.B. Knewtson, Edward E. Carey and M.B. Kirkham

. Occasional use of cover crops was reported by 21% of growers. Cover crops were grown on a regular basis in the winter by 13%, in the summer by 2.5%, and in summer and winter by 5% of growers. Fifty percent of growers practiced some form of crop rotation. Crop

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Dennis N. Portz and Gail R. Nonnecke

. Everts, K. Gallagher, E. 2004 Evaluation of crop rotation and other cultural practices for management of root-knot and lesion nematodes Agron. J. 96 1419 1428 Kremer, R. Li, J. 2003 Developing weed-suppressive soils through improved soil quality

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Sven Verlinden, Louis McDonald, James Kotcon and Silas Childs

and manure applications, cover crops and green manures, and crop rotations. In general, limiting tillage, judicious application of compost and green manures, the use of cover crops and green manures, and crop rotations have all shown beneficial effects