GMO Growers Know (2004, J. Riddle) (pdf), J. Riddle
Excerpt: This publication outlines some best management practices that GMO (genetically modified organisms) and non-GMO farmers need to know in order to minimize genetic drift, commingling, and other contamination. Co-existence is the ability of farmers to provide customers with a choice between GMO, non-GMO, and organic crops and products. Since different types of agriculture are practiced on adjoining fields, suitable measures during planting, cultivation, harvest, transport, storage, and processing are needed in order to prevent the accidental mixing of GMO and non-GMO material.