RYE (SECALE-CEREALE L) AND HAIRY VETCH (VICIA-VILLOSA ROTH) INTERCROPMANAGEMENT IN FRESH-MARKET VEGETABLES

The effect of cover-crop management on growth and yield of 'Bravo' cab bage (Brassica oleracea var, Capitata L.), 'Market Pride' tomato (Lyco persicon esculentum Mill.), and 'Mustang' snap bean (Phaseolus vulgari s L.) was determined, Each fall, 'Wheeler' winter rye(Secale cereale L .) and 'Oregon Crown' hairy vetch(Vicia villosa Roth) were interseeded . The following spring, the cover crops were killed by either applying glyphosate and mowing (CC-G) or mowing and disking (CC-D), Triflurali n was preplant incorporated into bare ground as a conventional tillage (CT) treatment, In 1992 and 1993, a chicken (Gallus gallus L.) based fertilizer was applied to half the subplots, The greatest snap bean an d cabbage yields were in CT, The system with the greatest tomato yield s varied. In 1991, the greatest tomato yields were in the CT treatment , while in 1992 yields were greatest in the CT and CC-D treatments, an d in 1993 the greatest yields were in CT and CC-G, Cabbage yields were greater in the fertilized than the unfertilized treatments,In 1992, i nfestations of diamondback moth, imported cabbageworm, and cabbage loo per were greater in CT than in the CC-G treatment, Three years of the CC-G treatment increased soil organic matter from 3.07 % to 3.48 % and increased soil pH from 6.30 to 6.51, while neither changed in the CT, Chemical names used: N-(phosphonomethyl) glycine (glyphosate); 2,6-di nitro-N,N-dipro'pyl-4-(trifluoromethyl) benzenamine (trifluralin).