((ALKYL,HALOALKYL, ALKOXY AND PHENOXY)-CARBONYL)-N(3-ALKYL AND PHENYL-1,2,4-THIADIAZOL-5-YL)-AMIDES, I.E. (ALKANOYL, HALOALKANOYL, CARBOALKOXY AND CARBOPHENOXY)-N-(3-ALKYL AND PHENYL-1,2,4-THIADIAZOL-5-YL)-AMIDES OR (ALKANOIC, HALOAKANOIC, MONOALKYL CARBONIC AND MONOPHENYL CARBONIC ACID)-N-(3-ALKYL AND PHENYL-1,2,4THIADIAZOL-5-YL)-AMIDES, WHICH POSSESS HERBICIDAL PROPERTIES, AND WHICH MAY BE PRUCED BY CONVENTIONAL METHODS.