Physical weed control typically yields highly variable results.  Flex-tine harrows are commonly used, and are often the only choice for organic grain farmers, but finding the right tool and settings can be a challenge. A study conducted by UMaine Weed Ecology Master’s student, Johnny Sanchez, focused on flex-tine harrows.  He investigated six tool systems’ weed control efficacy: read more How effective are tine weeders?