I'm new here, I want to ask how to make saltpeter or KNO3
Substantively, I have read to make it ,but it's need cow manure as the material, I
don't have cow manure and I difficult to get it,
Can I use another material to substitute the cow manure?
And please tell to me how to make it step by step and if not objection,
please give me an example in picture.
Please someone tell to me
Thank you very much