Method of making solid fertilizer herbicide granules

A method of making a plant fertilizer-herbicide composition which comprises:

• a. making a dry mixture of 1 to 100 parts by weight of a plant fertilizer component (A) selected from the group consisting of urea, ammonium nitrate, ammonium sulphate, ammonium chloride, ammonium phosphate, calcium nitrate, sodium nitrate, potassium nitrate, urea-aldehyde condensates, methylene ureas and mixtures thereof with ammonium phosphate, potassium nitrate, potassium phosphate, potassium sulphate, and potassium chloride;
• and 1 part by weight of a herbicide component (B) having a melting or softening point below 145.degree. C and below that of component (A) when mixed therewith, said component (B) also having a solubility in water not exceeding 1g/liter at 20.degree. C;
• wherein said herbicide component is selected from the group consisting of 2-tert-butyl-4,6-dinitro-5-methylphenyl acetate, 2-tert-butyl-4,6-dinitro-phenyl acetate, 2-tert-butyl-4,6-dinitrophenyl ethyl fumarate, 3-(4-bromo-3-chlorophenyl)-1-methoxy-1-methylurea, 3-(4-chlorophenyl)-1-methoxy-1-methylurea, isopropyl N-phenyl-carbamate, 2-chloro-N-isopropyl-acetanilide, and a triazine herbicide of the general formula:
• ##STR3## wherein X is OR or SR, the R groups being the same or different lower alkyl groups;
• b. thereafter extruding the dry mixture through a die at a temperature of 70.degree. to 145.degree. C whereby said herbicide component acts as a lubricant to permit ready extrusion of said fertilizer component in solid form and subsequently solidifies to bind said fertilizer component into a coherent extrudate.