Abstract
The common methods of counting Azotobacter spp. in soil, colony counts and MPN, were compared using cell suspensions of densities determined by direct microscopic counts. A highly significant positive correlation was found between the surface‐plate, MPN and total cell counts, but the MPN estimations approximated total cell counts much more closely. Inclusion of 1‐1.5 g of agar/l of the liquid medium enhanced multiplication of azotobacters and facilitated the recording of growth in MPN estimations. Copyright © 1968, Wiley Blackwell. All rights reserved
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CITATION STYLE
Abd‐el‐Malek, Y., & Ishac, Y. Z. (1968). Evaluation of Methods Used in Counting Azotobacters. Journal of Applied Bacteriology, 31(3), 267–275. https://doi.org/10.1111/j.1365-2672.1968.tb00367.x
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