If I understand your questions correctly.... GMO Round-Up Ready soy, corn, canola, alfalfa, sugar beets, etc....have a tolerance for Round-Up...in other words, Round-Up won't kill them the way it will normal crops...meaning the farmer can spray for weeds after crops are up rather than only before.....which is the way it used to be done. There's nothing forcing farmers to buy GMO, so a farmer could, if he/she wanted to, grow normal crops and save the seeds.