Tanga tagmant (S Teglizit: natural organic matter neɣ NOM) d amsegrew (anjmuɛ) n uddisen ikruraren igmanen tid n taftart taktalt yellan deg twennaṭin tigamayin neɣ timugrayin deg wakal neɣ deg waman Aẓaṛ n iyufa igamanen yettuɣal ar igulaz (ayen yegran) n imuddiren n yemɣan d iɣersiwen d timsegreyyin (iẓẓan) id ttaǧan