A composition including (a) at least one (thio)phosphoric acid triamide (T) according to the general formula (Ia)Ra1Ra2N—P(X)(NH2)2 (Ia)wherein X is oxygen or sulfur； Ra1 is a C1 to C20 alkyl, C3 to C20 cycloalkyl, C6 to C20 aryl, or dialkylaminocarbonyl group； Ra2 is H； or Ra1 and Ra2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur； and (b) at least one specific herbicide.
