ʻO ka fertilizer formula ka mea nui o ka inorganic fertilizer, organic fertilizer, mineral a pēlā aku.ʻO ka fertilizer inorganic i loko o ka mea hoʻohuihui, e like me ka urea he mea ʻino ia i ka mold apo, ʻo ka lua make apo a me ka lua cone i loko e hoʻohana nui ʻia e ka mineral, no laila e koho ʻia nā mea o ke apo i ke kila kila X46Cr13.ʻO ke apo fertilizer ring die aperture ka nui, ma waena o 3.0-6.0mm, ma muli o ka nui o ka friction coefficient, paʻakikī ka puka e hoʻokuʻu.