 i found a great curriculum resource for nitrogen cycling this is a little young but it does cover the n cycle  http extensionusuedu files publications publication wqmiddlehighs where in the material  this thing is 170 pages long where s the n part  about p 130 ish  about p 130 ish  i can t believe you re letting a student comment  bwa ha ha as a student i will reign this forum with a fist of unholy teenage terror  nitrogen forum  