▁rec y cling ▁schemes ▁for ▁it . ▁Trad itionally , ▁far ms ▁have ▁burn ed ▁sil age ▁pl ast ics ; ▁however ▁od or ▁and ▁smoke ▁concerns ▁have ▁led ▁certain ▁communities ▁to ▁restrict ▁that ▁practice . ▁ ▁St oring ▁sil age ▁Sil age ▁must ▁be ▁firm ly ▁pack ed ▁to ▁minim ize ▁the ▁o xygen ▁content , ▁or ▁it ▁will ▁spo il . ▁Sil age ▁goes ▁through ▁four ▁major ▁stages ▁in ▁a ▁sil o : ▁Pres e aling , ▁which , ▁after ▁the ▁first ▁few ▁days ▁after ▁filling ▁a ▁sil o , ▁enables ▁some ▁resp iration ▁and ▁some ▁dry ▁matter ▁( DM ) ▁loss , ▁but ▁stops ▁Fer ment ation , ▁which ▁occurs ▁over ▁a ▁few ▁weeks ; ▁p H ▁dro ps ; ▁there ▁is ▁more ▁DM ▁loss , ▁but ▁hem ic ell ul ose ▁is ▁broken ▁down ; ▁aer ob ic ▁resp iration ▁stops ▁In fil tr ation , ▁which ▁enables ▁some ▁o xygen ▁in fil tr ation , ▁allowing ▁for ▁limited ▁micro b ial ▁resp iration ; ▁available ▁car bo h yd r ates ▁( CH Os ) ▁are ▁lost ▁as ▁heat ▁and ▁gas ▁Em pty ing , ▁which ▁ex poses ▁surface , ▁causing ▁additional ▁loss ; ▁rate ▁of ▁loss ▁increases . ▁ ▁Saf ety ▁Sil os ▁are ▁potentially ▁ha z ard ous : ▁death s ▁may ▁occur ▁in ▁the ▁process ▁of ▁filling ▁and ▁maintain ing ▁them , ▁and ▁several ▁safety ▁pre ca utions ▁are ▁necessary . ▁There ▁is ▁a ▁risk ▁of ▁injury ▁by ▁mach in ery ▁or ▁from ▁falls .