Fertilizer formula yog tsim los ntawm inorganic chiv, organic chiv, ntxhia thiab lwm yam.Cov chiv inorganic nyob rau hauv compound fertilizer, xws li urea yog corrosive rau lub nplhaib pwm, lub nplhaib tuag qhov thiab lub khob hliav qab lub qhov yog hnav hnyav los ntawm cov ntxhia, yog li cov khoom ntawm lub nplhaib pwm yuav tsum tau xaiv stainless hlau X46Cr13.Compound fertilizer nplhaib tuag aperture yog feem ntau loj, thaj tsam ntawm 3.0-6.0mm, vim muaj kev sib txhuam loj coefficient, lub qhov yog qhov nyuaj rau paug.