Abstract
Experiments were conducted at two sites in Virginia to study the effects of tillage (conventional plow-disk and no-tillage) and overseeding of legume cover crops (red clover, Trifolium pretense L.; white clover, Trifolium repens L.; and hairy vetch, Vicia vellosa Roth.) at transplanting on weed suppression and yield of `Big Sur' broccoli (Brassica oleracea var. Italica Plenck). In both sites, weed suppression from overseeding was as good and in some cases superior to that in the herbicide-treated control plots. With the exception of hairy vetch in site 2, overseeding did not reduce broccoli yield. Weed suppression and broccoli yield were unaffected by tillage system and there were no tillage × overseeding effects. Based on our data, overseeding legumes could be an important component of our no-till system as we move towards more sustainable production methods for vegetables.
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