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Ozone impacts on competition between tomato and yellow nutsedge: above- and below-ground effects.
- Article from:
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Crop Science
- Article date:
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July 1, 2005
- Author:
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Copyright informationCOPYRIGHT 2005 Crop Science Society of America. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Tomato (Lycopersicon esculentum L.) production in the San Joaquin Valley (SJV) of California is challenged by air pollution and weeds. Differential ozone ([O.sub.3]) tolerance of tomato cultivars and weed species may alter crop-weed competition. A study was conducted in open top chambers (OTCs) at the Kearney Research and Extension Center, Parlier, CA, to assess [O.sub.3] impacts on competition between tomato and a [C.sub.4] weed, yellow nutsedge (Cyperus esculentus L.). Processing tomato (cv. HD 8892 and EMP 113) and nutsedge (locally collected biotypes) were grown in pots for 4 to 8 wk. Population ratios ranged from a tomato plant alone (0:1) to a nutsedge plant alone (1:0), and ...
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