Weed control is one of the greatest challenges in organic soybean production. Weed control strategies in organic systems include understanding the biology of major weeds, crop rotation, growing a competitive crop, use of mulches or cover crops, and timely tillage. This project focuses on three of these strategies: cover crop mulches, competitive varieties and tillage system. A series of field experiments will be conducted on long-term organically managed lands at Glenlea and Carman, MB in both 2009 and 2010. All experiments will be conducted using a randomized complete block experimental design with 4 replicates. All experiments will involve wide-row soybean production.