Let’s back up a minute. As I said in my previous post, farmers have to deal with weeds no matter what—the weeds want to crowd out crops to take over that luscious loamy farm soil and its nutrients, as well as water, space, and sunlight (apologies to all the weed scientists who just cringed at my anthropomorphism of weedy plants). To stop the weeds, farmers may cultivate, rotate crops, and plant rows close together. But this doesn’t necessarily get rid of all weeds, which means farmers still need a way to kill them. This may entail everything from spraying herbicides to flaming with propane torches to hand weeding.