I like the fan method.
Winnowing... interesting that you have a verb for that. We need three words to describe this action. This is remarkable if you consider that this is a archaic method and the general feasibility to create new words by assembly in our language.
It reminds me of an idea i have for quite a long time. I'm not really interested in farming so this might be a complete brain fart:
a maschine comparable to these ancient barn threshers but as a high tech version that is able to recognize and sort out all kind grain/blooms. My idea is that you have a wild or halfwild meadow, sowed wih a mix of different crop that complement each other in some kind of symbiosis. Well and then you mow the stuff, go to your barn and throw it into this machine and it sorts out the valuable stuff. Wheat, spelt, camomile, melissa, lovage and whatnot.
Does anything like this exist already?