I once was the coop guy, but that was long ago. I didn't know anyone still did impregnation. From a distance, It seems like a great solution for food plots. Yes, you need a decent amount of fertilizer, but if your not applying a decent amount of fertilizer, what's the point? A point or a quart of herbicide sprayed on 100 lbs of fertilizer shouldn't make soup. Oh, I know. There will be some water involved, but if the guy knows what he's doing, there shouldn't be a problem. He wants to spread fertilizer, not shovel goo out of the truck. Every pre-emergent herbicide needs some rain to move and spread it in the soil. But, I wonder about the need for pre-emergent herbicides in food plotting. I guess there are reasons, but there are alternative strategies. Not knowing what you plan to plant, I'll need to stop there.