Mesresha, please be very careful on how much you rely on " natural fertilizers" as opposed to chemical fertilizer and taxing their use to make certain there is enough to accommodate all agricultural needs, and the labor energy in using them is fully recovered by the increase in yield. I don't think this is possible, as we have already greatly exceeded the earth's natural carrying capacity. Please review the following webpages:
RE: Enhancing funding and service delivery in agriculture: any ideas?
United States of America
Richard Tinsley
Professor Emeritus
Colorado State University
Posted on 10/10/2019
Mesresha, please be very careful on how much you rely on " natural fertilizers" as opposed to chemical fertilizer and taxing their use to make certain there is enough to accommodate all agricultural needs, and the labor energy in using them is fully recovered by the increase in yield. I don't think this is possible, as we have already greatly exceeded the earth's natural carrying capacity. Please review the following webpages:
https://smallholderagriculture.agsci.colostate.edu/sustainability-of-sm…
https://smallholderagriculture.agsci.colostate.edu/organic-source-of-nu…;