Manure is a valuable nutrient source, but if poorly managed, it can also be a wellspring of bacterial contamination for crops. Lindsay Gilmour, Kimberly Raikes and Rodette Jones discussed contamination pathways and prevention methods during a Feb. 23 webinar presented by Future Harvest CASA. Farmers need to recognize potentially hazardous situations, assess the situation and find methods to eliminate the risks of contamination, said Jones, who manages the Filbert Street Community Garden in Baltimore. The closer a food product grows to the ground, the more vulnerable it is to contamination, Gilmour said. Leafy greens and squash, for example, would be in the manure splash zone.