NOVELTY - Producing highly nutritious and bioavailable organic nitrogen fertilizer, by slurrying protein rich ground products solid content, heating slurry, adding an oil absorbent to slurry, adding carbohydrate digesting enzymes to substrate, performing digestion, adding proteolytic enzymes, performing proteolysis after adding carbohydrate digesting enzymes to slurry, inactivating the enzymes by increasing temperature of the reaction mass, filtering reaction mass, adjusting pH of liquid and optionally concentrating and drying liquid fertilizer.    USE - The process is useful for production of highly nutritious and bioavailable organic nitrogen fertilizer (claimed).    ADVANTAGE - The process enables production of highly nutritious and bioavailable organic nitrogen fertilizer having improved storage stability in liquid form. The amino acids and peptides and nitrogen content present in the organic fertilizer gets rapidly absorbed when being applied to plants. The fertilizer has high protein content. The production process is cost-effective.    DETAILED DESCRIPTION - Process for production of highly nutritious and bioavailable organic nitrogen fertilizer, involves (a) slurrying 8-18% solid content of protein rich ground products preferably ground guar meal of 100 mesh size to 1-2 mm using de-mineralized water and heating the slurry mixture at 50-100 degrees C, (b) adding an oil absorbent to the slurry for reducing oil content of the substrate, (c) adding one or more carbohydrate digesting enzymes or their combinations to the substrate and performing digestion at 40-60 degrees C and pH of 5-6, (d) adding one or more proteolytic enzymes or their combinations, performing proteolysis at 40-100 degrees C for at least 3-4 hours after addition of carbohydrate digesting enzymes to the slurry followed by increasing temperature of the reaction mass to 65-150 degrees C for 2-3 hours to inactivate the enzymes, (e) filtering the reaction mass for separating molecules having molecular weight of 1000 or less from the mixture followed by adjusting pH of liquid to 2.5-4 using acid buffer to obtain organic nitrogen fertilizer, and (f) optionally concentrating and drying the liquid fertilizer. An INDEPENDENT CLAIM is included for highly nutritious and bioavailable organic nitrogen fertilizer produced from guar meal derived from non-genetically modified organisms (GMO).