I now got confirmed from one of Fukuokas students (Panos Manikis) that Fukuoka bought clover seeds. I must admit that it's a bit disappointing since clover was such an important part of his system. I think that growing clover for seed over a long period of time without tilling is very difficult, because you will probably get a lot of other unwanted plants growing toghether with it as time passes. By tilling you can have better control of the the unwanted plants. You can of course also use herbicides in stead of tilling, but I don't think that's a good option. So this means that a natural farmer using clover as a cover crop is dependent on another farmer tilling his soil to produce the seeds. I think of course, that this is a much better option than having both the farmers tilling the soil, and the clover seed farmer can produce seeds to alot of natural farmers. So in total, it will be much less tilling.
Btw; could somebody move this thread to the Masanobu Fukuoka forum?