▁to ▁speed ▁fer ment ation ▁or ▁improve ▁the ▁resulting ▁sil age . ▁Sil age ▁in oc ul ants ▁contain ▁one ▁or ▁more ▁stra ins ▁of ▁la ctic ▁acid ▁b acter ia , ▁and ▁the ▁most ▁common ▁is ▁L act ob ac ill us ▁plant ar um . ▁Other ▁b acter ia ▁used ▁include ▁L act ob ac ill us ▁b uch ner i , ▁Enter oc oc cus ▁fa e ci um ▁and ▁Ped i oc oc cus ▁species . ▁ ▁Ry egr ass es ▁have ▁high ▁sug ars ▁and ▁respond ▁to ▁nit ro gen ▁fert il iser ▁better ▁than ▁any ▁other ▁grass ▁species . ▁These ▁two ▁qual ities ▁have ▁made ▁ry egr ass ▁the ▁most ▁popular ▁grass ▁for ▁sil age ▁making ▁for ▁the ▁last ▁si xty ▁years . ▁There ▁are ▁three ▁ry egr ass es ▁in ▁seed ▁form ▁and ▁commonly ▁used : ▁Italian , ▁Per enn ial ▁and ▁Hy brid . ▁ ▁Pol l ution ▁and ▁waste ▁The ▁fer ment ation ▁process ▁of ▁sil o ▁or ▁pit ▁sil age ▁releases ▁liquid . ▁Sil o ▁eff lu ent ▁is ▁cor ros ive . ▁It ▁can ▁also ▁cont amin ate ▁water ▁sources ▁unless ▁collected ▁and ▁treated . ▁The ▁high ▁nut ri ent ▁content ▁can ▁lead ▁to ▁e ut roph ic ation ▁( hy pert roph ic ation ), ▁the ▁growth ▁of ▁b acter ial ▁or ▁alg al ▁blo oms . ▁ ▁Pl astic ▁sheet ing ▁used ▁for ▁se aling ▁pit ▁or ▁b aled ▁sil age ▁needs ▁proper ▁dispos al , ▁and ▁some ▁areas ▁have