Persistent herbicides (PH) pose an existential threat to commercial, municipal and community composting, and to the emerging circular economy. PH have been found in composts in many states and have cost compost producers millions of dollars. A survey of US Compost Council members composts revealed that approximately 4% of ready to sell composts have phytotoxic… Continue reading PRO.215-Development of Detailed Bioassays for Persistent Herbicides-AC22.CREF