... 13-13-21, 11-22-16, 12-12-17+2MgO,15-15-15 20-10-10 12-12-17 NPK compound fertilizersSince the establishment of ... 6-6, 17-17-17, 16-16-16, 15-15-15, 12-6-22, 12-1-4, 5-5-5, 24-6-10, ... :00-20-20, 00-10-10, 00-12-17, 00-10-15, 00-5-17, 00-18-13, 00 ... 19-19, 18-18-18, 30-10-10, 15-15-30, 15-30-15, 10-40-25, 08-08-32, chemical fertilizer ... 5MgO+TE, 13-13-21, 11-22-16, 12-12-17+2MgO,15-15-15 20-10-10 12-12-17