Fertilizer formula inonyanya kuumbwa neinorganic fetireza, organic fetiraiza, mineral uye zvichingodaro.Iyo inorganic fetireza mucompound fetireza, senge urea inoparadza kune ring mold, iyo ring difa gomba uye yemukati cone gomba zvakapfekwa zvakanyanya nemaminerari, saka zvinhu zvemhete mold zvinofanirwa kusarudzwa Stainless simbi X46Cr13.Compound fetireza ring die aperture yakakura, inosiyana pakati pe3.0-6.0mm, nekuda kweiyo hombe friction coefficient, gomba rakaoma kuburitsa.