Ukuveliswa, i-faritory ye-faritor ithathele ingqalelo i-probletaction yendalo kunye nokusetyenziswa kwamandla amatsha. Thatha "umhlaba oluhlaza" njengezikhokelo zemveliso.
Eyona nto iphambili ikhokelele i-nitrate, zinc sulphate, i-sodium metabisisulphite, kunye nesodium.
Iofisi yethu
