The Primary first step in the Nitrogen Cycle : Another helpful graph

Nitrogen fixing is getting the ( N≡N ) molecular nitrogen
out of the atmosphere and making ammonia. Bacteria, " in the soil ",
fix nitrogen from the air and make ( NH₃ + NH₃ ) ammonia.

Really, this takes a lot of energy to farming. A few species of bacteria
do it naturally. The agriculture industry uses vast amounts of natural gas
to make ammonia from atmospheric nitrogen that is expensive.

In FindArticles . . . . Search

Lets start at the very beginning of time ?

next cycle . . . ammonia

Anabaena . . . . added June 29, '01 . . . Google Images Search . . . added Aug. 9,'03 . . . Nov. 8, '03

display gone now Nitrogen fixation . . . . added Oct.18, '01

Fixation and nitrogenase . . . . added Nov.10,

Global requirements of N≡N fixation . . . . added Nov.15,

display gone now The Nitrogen Fixation ect . . . . added April, 02

Heterocyst Images in Google . . . added Nov. 5, '03

N Fixing Rhizobia

Root Nodules . . . . . Yahoo Picture Search

Root Nodules . . . . added April '05

Yahoo Search on Nitrogen Fixing Nodules

Images Search on Nitrogenase in Yahoo

Rhizobium bacteria in Yahoo image search . . . . added Nov. 17, '03

Nfixing organisms from Reed Academy . . . . added June 16, '03

Find Articles Nitrogen Fixing Plants . . . .

Ocean and Nitrogen

Slide show . . . added Nov. '05   hhhN     Keep in mind the plants add Nitrogen to the soil
when plowed back in.

Back to Welcome Page

When you see it, you are getting it :    added Nov. 8, '03

nitrogen    N≡N    nitrogenase fixation
                hN=Nh
              hhN-Nhh
          hhhN     Nhhh + 3 O

November '03
As You can tell I am trying to explain Nitrogen Fixation :
Try this next link

I am Trying to explain this subject

There is a technical problem to get clear explanation on the N2 fixing.
mofe protein

How is this 3-D view . . . click on QuickPDB button and move image around

Can you follow this
and this

Can you figure this

3 H₂     -     N₂
2 H₂     -     h-N=N-h
   H₂     -     hh-N-N-hh
               NH₃ -  NH₃  =  Ammonia

This link could explain some

MoFe Cofactor that binds nitrogen - in Yahoo Search

Nitrogenase . . first binds to the nitrogen. . added Nov. '05

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Nitrogenase Complex

Below here I want to say that the basic idea of Nitrogen is easy to learn.
trying to understand the Nitrogenase more exactly is a puzzle that needs pieces from all over.

The various Nitrogen Fixing bacteria

Azotobacter . . . . found this July '08

Cyanobacteria very large variety of them . . . . added Jan. '08

Yahoo images of Nitro Micro fixing bacteria

You start from the beginning of time