Author:
Nelson D. C.,Thoreson Myron C.
Abstract
Mixtures of annual weeds emerging 1 week after and competing all season with potatoes (Solanum tuberosumL.) reduced tuber yields by an average of 54% compared to 16% in comparable treatments in which weeds emerged 3 weeks after potatoes. Weeds reduced tuber yields 19% 8 weeks after potatoes emerged and 25 to 45% 10 weeks after emergence. After full-season competition, for each additional 10% of the total dry biomass represented by weeds, there was a decrease of 12% in fresh tuber yield. This relationship was not valid if potatoes were harvested early, which reduced the deleterious effect of weeds on potato yields. Weed competition reduced both size and number of tubers, but had little effect on specific gravity of tubers. In some instances, the reduction in tuber size by weeds reduced the percentage of tubers that were marketable.
Publisher
Cambridge University Press (CUP)
Subject
Plant Science,Agronomy and Crop Science
Reference20 articles.
1. Influence of nitrogen on weed competition in cotton;Buchanan;Weed Sci.,1975
2. Competitive ability of potato cultivars with major weed species;Yip;Northeast. Weed Sci. Soc. Proc.,1974
3. Commercial Potato Production;Kehr;Agr. Handbook,1964
4. Competition of Florida beggarweed and sicklepod with peanuts. I. Effect of periods of weed-free maintenance or weed competition;Hauser;Weed Sci.,1975
5. Weed interference in pickling cucumbers (Cucumis sativus;Friesen;Weed Sci.,1978
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