Our research objective was to compare cover crop seeding mixtures, planting
dates, and termination dates on performance of rye (Secale cereale L.) and hairy vetch
(Vicia villosa Roth) monocultures and mixtures in the maritime Pacific Northwest USA. The
study included four seed mixtures (100% hairy vetch, 25% rye-75% hairy vetch, 50% rye-
50% hairy vetch, and 100% rye by seed weight), two planting dates, and two termination
dates, using a split-split plot design with four replications over six years