Influence of calcium ions on growth and nitrogen fixation in cultures of the nitrogen fixing micro-organism Azotobacter chroococcum strain no. 120/2--1B/2B at pH values 6.5,7.0 and 7.5.
D001395:Azotobacter / Q000254:growth & development*; D002118:Calcium; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D009584:Nitrogen
D009584:Nitrogen; D002118:Calcium