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reviews multiple steps of the nitrogen cycle and different forms of nitrogen created, used for APES

Nitrogen Fixation

conversion of N2 gas into usable NH4 (clouds->ground)

Nitrification

conversion of NH4 to NO3, first going through NO2 (all in ground)

Assimilation

uptake of usable nitrogen (NH4) by plants (ground->trees/plants)

Ammonification

organic nitrogen wastes convert/break down back to usable nitrogen forms (ground)

Denitrification

converting usable NH4 or NO3 into gas forms, N2 or N2O (ground -> air)

Nitrogen gas

N2, non usable

Nitrite

NO2 -, non usable

Ammonium

NH4, usable

Nitrate

NO3-, usable

Haber Process

Artificial process that take N2 and converts into chemical synthetic fertilizer, requires energy from fossil fuels

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