Study Examines Food Safety of Manure-Based Soil Amendments

The Organic Center reports that a study published in Frontiers in Sustainable Food Systems found that properly managed manure-based soil amendments are safe for use in crops to be eaten fresh. This study examined the potential for bacterial transfer to fresh produce harvested from USDA NOP certified organic farms. It found that pathogens diminished over time but at different rates. Current waiting periods for organic produce of 90 or 120 days, depending on which part of the plant is to be eaten, were validated by this study. The study authors caution that results should not be generalized and that additional research is needed.