i was told it wasn’t about the size of the yield, it was the way the plant grows. they said nothing but stalk for the first two thirds of the plant like wheat. that’s for fiber, not seed. for seed it would be way lower but we didn’t discuss seed. there are a few hemp growers i know locally i need to sit down and talk with.
what you say about density for france being different from the us makes no sense to me. if they grow it four times as dense as we do there has to be a reason. i can’t see anyone wasting that much seed and effort if there was no gain from it.