Farming

I remember as a boy, when the harvest came in.  In particular, one year I got to watch the soybeans and wheat get harvested and shot into a big hopper trailer.  I looked inside the hopper and to my surprise, there was the soybeans or wheat, but there was also all kinds of grasshoppers, bug bodies, weeds, and leaves.  I wouldn't have said then, that in a single harvest of soybeans, you would have got "only" soybeans or wheat, there was a lot of foreign matter.