Fukuoka San always broadcasts next crop seeds 3-4 weeks before the harvest of an existing crop. That is wheat seeds in an existing rice crop or rice seeds in an existing wheat crop. Idea is to have the field covered with some crops all the time, without giving weeds a chance.
I wanted to try this in my no-till field, but since my no-till experiment is not successful, this was postponed. Now in my organic rice field which is done using ploughing, this time wanted to try this method. Anyway after the 2nd crop, typically field is left fallow, sometime I do cowpea and once tried sesame.
Finally I could not do this on right time, just 1 week before the harvest I just broadcasted 2Kgs of cowpea seeds and 0.25 Kg of sesame seeds. While lot of the cowpea seeds germinated and was not affected by the trampling by women workers during harvest. Even they told lot of the cowpea plants may get trampled, but to my surprise, I could see most of them were intact.
Sesame didn't germinate at all, I think, it should have been broadcasted much earlier. Fukuoka San says, if the seeds are broadcasted 3-4 weeks before, germination will be good since there is good moisture content. If there is better moisture content, germination is always good.
Going further would like to experiment with this method more, it looks to be a quite effective method.