Abstract: This invention relates to a process for the preparation of fertilizers comprising in the step of analyzing and drying any agricultural wastes, crushing the dried waste to the size of 30 to 100 mesh and feeding the waste into the bio-reactor, adding Mesophilic and Thermophilic bacteria into said bio-reactor and sealing the same, keeping said sealed bio-reactor for a period of 48 to 96 hours for the decomposition of the waste, passing steam through said bio-reactor in order to sterile the compost, removing the composte waste from the reactor and subjecting the same to the step of homogenization, feeding the homogenized mixture into peddle mixture and nutrients and/or additives being added therein, operating said peddle mixture for a period upto 45 minutes and then mixture so obtained being subjected to the step of pelletization or tablating followed by the step of drying so as to keep the moisture between 10 to 15% weight by weight herein described being added therein.