ulation ▁of ▁nit ro gen ▁in ▁by - products ▁of ▁micro b ial ▁activity . ▁N it ro gen ▁Acc um ulation ▁in ▁by - products ▁of ▁micro b ial ▁activity ▁nit ro gen ▁accum ulation ▁in ▁decay ing ▁plant ▁de br is ▁follows ▁a ▁two - phase ▁mechanism ▁Following ▁the ▁initial ▁le aching ▁of ▁sol ub le ▁materials ▁from ▁fresh ▁det rit us , ▁ex o enz ym es ▁dep ol ym er ize ▁the ▁det rit us ▁substr ate ▁producing ▁re active ▁car bo h yd r ates , ▁phen ol ics , ▁small ▁pe pt ides , ▁and ▁am ino ▁ac ids , ▁this ▁is ▁a ▁period ▁where by ▁micro b ial ▁growth ▁is ▁rapid . ▁with ▁micro bes ▁converting ▁substr ate ▁nit ro gen ▁and ▁ex ogen ous ▁nit ro gen ▁into ▁micro b ial ▁bi om ass ▁and ▁ex ud ed ▁products ▁of ▁micro b ial ▁activity . ▁ ▁See ▁also ▁▁ ▁Min eral ization ▁( so il ▁science ) ▁ ▁N it ro gen ▁cycle ▁ ▁N it r ification ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : So il ▁science ▁Category : N it ro gen <0x0A> </s> ▁C ash ▁Cab ▁is ▁an ▁Australian ▁music ▁t riv ia ▁game ▁show ▁hosted ▁by ▁James ▁Ker ley , ▁except ▁for ▁the ▁third ▁season , ▁where ▁he ▁was ▁replaced ▁by ▁Charlie ▁Pick ering . ▁It ▁is ▁part ▁of ▁the ▁global ▁C ash ▁Cab ▁franch ise ▁that ▁origin ated ▁in ▁the ▁United ▁Kingdom . ▁The ▁first ▁two ▁seasons ▁of ▁the