On the way to farm, there are plenty of paddy fields and I like watching different phases of paddy cultivation. In one part of the paddy field which is uncultivated, I used to see some daincha plants which grows very tall. In the summer it will get dried and now in the rainy season, there are daincha plants growing luxuriously. The fallen seeds germinate at the right time and establish well by the rain. This is a fundamental principle of natural farming. We have to observe nature and see which seeds gets fallen in nature and if we mimic nature this way, by putting seeds when they naturally fall in nature, then they will establish well.
For e.g to cultivate a vegetable in natural way, you have to see when it germinates well naturally and establishes. If you look at your surroundings, then you will be able to figure it out. Some of these plants will come up and if you can put those seeds without getting eaten by insects or birds, then there is a good chance that they establish. Ideally make seed balls with these seeds and then put them under field.