The invention relates to a homogeneous, solid, particulate, urea-based composition comprising elemental sulphur and a urease inhibitor of the type phosphoric triamide, wherein the urea-based composition comprising elemental sulphur is further characterized in that one or more of the following measures applies: a) it comprises 5 weight% or less, relative to the total weight of the composition, of one or more alkaline or alkaline-forming inorganic or organic compounds； or b) it comprises an anticaking and/or moisture-repellent coating. The composition according to the invention has improved properties for reducing ammonia loss by urease activity in the soil and is in particular suitable as a fertilizer. The invention further relates to a method for the manufacture of a homogeneous, solid, particulate urea-based composition comprising urea, elemental sulphur and a urease inhibitor of the type phosphoric triamide, in particular N-(n-butyl) thiophosphoric triamide (nBTPT), as well as to a composition of kit of parts comprising: a) one or more alkaline or alkaline-forming inorganic or organic compounds； b) the urease inhibitor of the type phosphoric triamide in solid particulate or a liquid form, preferably wherein the urease inhibitor is N-(n-butyl) thiophosphoric triamide (nBTPT)； c) optionally, one or more anticaking and/or moisture-repellent compounds.L'invention concerne une composition homogène, solide, particulaire, à base d'urée contenant du soufre élémentaire et un inhibiteur d'uréase du type triamide phosphorique, ladite composition à base d'urée contenant du soufre élémentaire étant en outre caractérisée en ce qu'une ou plusieurs des mesures suivantes s'appliquent : a) elle comprend au plus 5 % en poids, par rapport au poids total de la composition, d'un ou plusieurs composés inorganiques ou organiques alcalins ou formant un alcalin； ou b) elle comprend un revêtement anti-agglomérant et/ou hydrofuge. La composition selon l'invention présente des propriétés amél
