Fa'aaogāga o le ferrous sulphate

O a fanua e masani ona faʻaaogaina ai le ferrous sulfate faʻatoʻaga? E mafai ona faʻaaogaina le ferrous sulphate mono ma le ferrous sulphate heptahydrate e fai ma faʻapalaga poʻo vailaʻau faʻasaina. I le avea ai ma vailaʻau faʻasaina, e mafai ona puipuia ma pulea faʻamaʻi, e pei o le wheat smut...