| abstract |
A method for producing a slow-acting fertilizer by mixing heated urea with a gypsum-containing substance, characterized in that, in order to obtain a fertilizer that does not contain biuret, with a high content of urea nitrogen, urea is pre-mixed with ammonium nitrate at a molar ratio of 1: 0.1 to 0.33 , is heated to 75-85s and mixed with the gypsum-containing. substance - phosphogypsum at a molar ratio of urea-phosphogypsum 1: 0.9-1.1. |