From what I read, you plant the winter wheat as soon as possible after mid-summer when the days start shortening again. It seems you also only need 4 plants per square metre.
What about the other grains? I also have some barley, oats and rye that I was sold as suitable for winter planting but did not get planted out last autumn. Do you plant them at the same time and the same distance apart?
I am also asking a question about growing temporary beds this style in another topic.
My impression is that they use varieties that take up to a year to mature and the next crop is planted as the previous one is harvested. Maybe there are variants on it, I dunno. So I don't think most of the other grains would work in this system, though maybe rye would.
Willie Smits: Village Based Permaculture Approaches in Indonesia (video)