The subject of {HEAD ~ the invention} is a method of treating biological masses to produce a solid material which can be used as an agricultural fertiliser and {TAIL ~ conditioner}, characterized in that it includes the steps of: 
The subject of { HEAD ~ the invention } is a method of treating biological masses to produce a solid material which can be used as an agricultural fertiliser and { TAIL ~ conditioner } , characterized in that it includes the steps of :
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