Administrative Report Or Publication
 

Chemical fallow in Oregon dryland grain

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  • Downy brome and other weedy grasses infest three million acres in Washington, Oregon, and Idaho. These weeds are difficult to control when using conservation tillage practices such as stubble mulch, trashy fallow, reduced tillage, minimum tillage, no-till, and even when moldboard plowing (Rydrych 1974). There are options in chemical fallow that can be used to supplement tillage so that trashy seedbeds and straw layers do not favor weed establishment. Weedy grasses, volunteer grains, and broadleaf weeds can be controlled by chemical treatment when weather is unfa­vorable for tillage or soil disturbance is not desirable (Rydrych and Maxwell 1983).
  • Published June 1985. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
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