This is what I would have studied if I had continued university. There was amazing agriculture in Al Andalus.
Simple things like if you are going to plough the earth then plant the seeds on the ridge that the plough leaves during the wet season, and plant it in the valley during the dry. This improved yields tremendously and takes far less seed than broadcasting on both ridge and valley of a ploughed field.
I would still like to study this. I think there is a lot we can learn from history, and I feel there is a great deal we can incorporate into
permaculture.
Now, to get my hands on an english translation of The Book of Farming that the guy talks about in the video. Anyone got amazing google-fu to help me find it?