I have had very important information about fertilizer especially the bio-compos (you can find the bio compos technical process from google.com or youtube.com)[check it out ]. They said " the best fertilizer for a plant was came from them self" of course it's through a natural process. What the meaning is that. The meaning is just only the right resources would become the true destination. If you need the good fertilizer for the rice's plant, just take it from them self. Just that from me. Your posting is very much interesting, although simple. And Mr. @blogtrades's comment it's a truht of fact. I don't know when he had been came to Aceh. Good luck bro.