This year have been doing some experiments with no-till rice. One field is in the farm using Pureria as cover crop which had controlled all strong grasses and gave a clean field to start no-till rice. Had removed all the cut Pureria to one side and sown the pre-germinated rice seeds of an upland variety called 'Katta modan'. The density was more and there was good line spacing. But could see that there is no tillering for the rice. One reason could be that no-fertilizer and soil open to sun and rain, built fertility would have lost? When conventional fields are compared, they till the soil and all the grass and straw will be allowed to decompose and then transplanting starts. Even though field is plowed, it is made fertile and hence growth of rice plants is better.
In natural farming no-till field, even Fukuoka san recommended 600-900 pounds of well decomposed chicken manure per quarter acre. So this is some thing to be seriously considered. Also the field should be covered with mulch.