Spent my teens working on a mixed crop farm thoughout the sixties, Roundup is pretty tame compared to the stuff we used back then as herbicides. I know it doesn't make it right or friendly but look up stuff like Atrazine, Mecoprop, 2-4-D, Dicambra and 2-4-5T and their dangers as herbicide. We also did potatoes, the seed potatoes we would plant would be dusted with Captan as a fungicide and I believe we also sprayed the plants with it as a powdery mildew prevention. In my life I think we have made a lot of progress in the farm chemicals we used. Oh , we had over a thousand fruit trees, pretty sure we put a lot of DDT in the air as well.