1. La'ititi hygroscopic, e le faigofie ona fa'apalapala: ammonium sulfate e fai si la'ititi hygroscopic, e le faigofie ona fa'apipi'i, faigofie ona teu ma felauaiga. ?
2. Tulaga lelei fa'aletino ma vaila'au: fa'atusatusa i le ammonium nitrate ma le ammonium bicarbonate, ammonium sulfate e lelei mea fa'aletino ma mautu vaila'au, talafeagai mo le teuina ma le fa'aoga umi. ?
3. Faʻatoʻaga faʻavavevave: ammonium sulfate o se faʻalaʻau faʻavavevave, talafeagai mo eleele alkaline, e mafai ona vave maua ai le nitrogen ma le sulfur e manaʻomia e laau, faʻaleleia le tuputupu aʻe o laau. ?
4. Faʻaleleia le faʻamalosia o faʻatoʻaga: O le faʻaaogaina o le ammonium sulfate e mafai ona faʻaleleia ai le faʻamalosia o fualaʻau ma faʻaleleia le gafatia o fualaʻau e faʻafetaui i le siosiomaga leaga. ?
5. Fa'aaogāga e tele: fa'aopoopo i le fai fa'alaisa, o le ammonium sulfate o lo'o fa'aaogaina lautele i vaila'au, ie, pia ma isi matā'upu.