Here is a video from WW2 on Hemp production. @Farmer_Dan, look at the Ford 8N as a harvester. And the scythe, I think I have a Hemp Scythe of that vintage. It is different than wheat Scythe, with the curved, morish blade.
https://www.youtube.com/watch?v=W0xHCkOnn-A
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A couple more links
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And my favorite of all for you budding genetic engineering Fun at how we got here.
Follow the citations
One more because who does not like citation
https://www.journals.uchicago.edu/doi/citedby/10.1086/335843
Anyone want to spend ten bucks or you have to wait tell I go to the Uās library in person 
@MK3_Pharms, you might like these.
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