I'll agree with you Dan, at least with the theory. It seems like nothing is squeaky clean anymore. My high school biology teacher used to advise us to turn down any offer to tour a food plant, especially one that made hot dogs or ketchup. That was back in the days when one of the ketchup manufacturers had that TV commercial that showed a huge, beautiful tomato being sucked into an empty ketchup bottle. Sometimes it's nice we can live in a world protected from the reality of economics. There's probably plenty of that in your world that I'd rather not know about, too. Like on a gallons per acre basis, where does the majority of gasoline get used, home lawns or farmer's fields? I don't know everything that goes into growing grain, but whatever it is they sure don't seem to get much per pound for the stuff. If I can buy it retail for $0.10 per pound, what do the farmers get? And I'm thinking I can get it retail bulk for $0.05/pound. With Dan's thoughts in mind, there are alternatives to using perfectly good food for a fertilizer. The best one I can think of quickly is used coffee grounds. These are going to the dumpster unless someone rescues them. Coffee grounds are an amazing product, too. They go from as high as $10/pound to absolutely worthless in 3 minutes. Amazing. But they still are full of protein and very useful as a "free" fertilizer. Corn gluten meal is in a similar position. It probably never went to the dumpster, but using it for feed is pretty close. Another waste product that is not available in very many places is called distiller's grains - basically the cooked corn, hops, and yeast used to make whiskey. Cottonseed meal is another waste product relegated to feed. Ground leather, ground feathers, hooves, horns, and hair are great organic sources of protein but the soil microbes can only decompose them in geologic time frames. A hot compost pile can vaporize them in in under a week, but in cool soil it takes longer. If you can figure out a way to bring them to market, the dead dog and cat supply is huge. As much as people want to believe these animals are used to make animal food it doesn't happen. The ratio of muscle mass to skin/hair is not good enough make them a profitable food source. Cattle and chicken blood and organs make great fertilizer but I'm not familiar with anyone who has used them in bulk successfully. Too expensive now. The tons of seaweed that wash ashore are excellent sources of environmentally friendly protein. But back to the point I keep returning to. If a client waves his bulging wallet in your face and says he wants you to put a legitimate organic fertilizer on, what are you going to do? Unless you read this forum, you're either going to refer him to someone else or give him a line of BS that he'll probably see through. If you get yourself educated (here and elsewhere), you can talk to him about the pros and cons. If you want to explain how many corn plants went to the gallows to make his fertilizer, you'll kill a legitimate deal.