FIELD: herbicides, agriculture. SUBSTANCE: invention describes method of preparing dry phytoactive ammonium-N- phosphonomethylglycine that can be filled with one or some adjuvant with high efficiency. Method involves interaction of an aqueous ammonium hydroxide with moist "tablet" of N-phospho- nomethylglycine in system of suitable reactor to yield the formation of reaction mass where moisture content is decreased continuously in the process of reaction. Method provides preparing the noncaking herbicide composition. EFFECT: improved method of preparing. 20 cl, 1 dwg, 2 ex
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