NOVELTY - A process (P1) for manufacture of an agricultural nutrient composition, involves: (A) batching and blending dry nutrient containing calcined powder to give dry powders comprising intimate mixture of powders containing insoluble phosphatic and potassic nutrients; (B) absorbing liquidous nutrient containing proteinaceous slurries on to dry powders; (C) allowing time for exothermic reaction to thermally polymerize the slurries and absorb polymer onto dry powders to produce cake; and (D) granulating the cake to complete polymerization to produce insoluble nitrogenous material.    USE - For manufacturing an agricultural nutrient composition, which is useful as agricultural fertilizers (claimed), for sustainable farming.    ADVANTAGE - The process produces the granular product which is produced virtually entirely from renewable raw materials via renewable energy processes and is thus an environmentally sustainable manufacturing route to global agricultural fertilizers. The process manufactures extended release balanced nutrient granular fertilizer for the agricultural cultivation of biennial and perennial crops, where the crop is sustained without further nutrification for up to three years. The provision of such an extended release balanced fertilizer facilitates the cultivation of longer term crops than are currently conventionally grown. This in turn reduces the structural degradation caused by excessive fertilization and frequent ploughing. The proposed manufacturing route to these extended release balanced fertilizers is not dependent on the consumption of depleting fossil fuels such as natural gas and crude oil. The total quantity of fertilizer needed for cropping is significantly reduced via both the avoidance of leaching and the selection of appropriate biennial and perennial crops. Many conventional annual crops, such as cereals, can be replaced by biennial and or perennial crops, both for human food production and animal grazing and feeding. The process is a zero fossil fuel route to balanced nutrient extended release fertilizers. All the energy consumed and raw materials processed are renewable. The nutrient losses caused by leaching of the soil are virtually eliminated. The overall agronomic effect according to the present process is that biennial and perennial crop growth and ripening are maximized via the provision of balanced nutrification over a period of up to three years.    DETAILED DESCRIPTION - A process (P1) for the manufacture of an agricultural nutrient composition involves    (A) batching and blending dry nutrient containing calcined powder to give dry powders comprising an intimate mixture of powders containing insoluble phosphatic and potassic nutrients;    (B) absorbing liquidous nutrient containing proteinaceous slurries on to the dry powders;    (C) allowing time for an exothermic reaction to thermally polymerize the proteinaceous slurries and absorb the cross-linked nitrogenous polymer onto the dry powders to produce a cake; and    (D) granulating the cake so as to complete the thermal polymerization process to produce an insoluble nitrogenous material intimately mixed with insoluble phosphatic and potassic nutrients.    INDEPENDENT CLAIMS are included for the following:    (1) an agricultural nutrient composition, comprising a granulated blend of polymerized organic nitrogen containing wastes together with calcined mineral sources of phosphate, potash, secondary phyto nutrients and phyto trace element; and    (2) an agricultural nutrient composition obtainable by using the process (P1).