Khad aan la tirtiri karin, oo lagu marsan karo burush, qalin sumadeeyaha, buufinta ama marka faraha codbixiyayaasha lagu dhex geliyo dhalo, ayaa ka kooban nitrate qalin ah.Awooddeeda in ay wasakhayso farta muddo ku filan - guud ahaan in ka badan 12 saacadood - waxay si weyn ugu xidhan tahay fiirsashada nitrate-ka qalinka ah, sida loo mariyo iyo inta ay ku sii jirto maqaarka iyo cidiyaha faraha ka hor inta aan khad xad dhaaf ah la tirtirin.Waxa ku jira Nitrate-ka qalinku waxa uu noqon karaa 5%, 7%, 10%, 14%, 15%, 20%, 25%.
Qalin sumadeeyaha aan la tirtiri karin ayaa lagu dabaqaa farta hore ee cod-bixiyayaasha xilliga doorashada si looga hortago musuqmaasuqa doorashada sida laba-codeynta.Waa hab wax ku ool ah oo loogu talagalay wadamada dukumentiyada aqoonsiga ee muwaadiniinta aan had iyo jeer la jaan qaadin ama hay'ad ahaan.