Inhibition of Azotobacter by soil actinomycetes
1947
Nickell, L.G. | Burkholder, P.R.
The inhibition of Azotobacter vinelandii by 25 cultures of actinomycetes isolated from soil samples obtained in different parts of the world is demonstrated with nutrient agar streak plates and with shaken culture broths in filter paper agar plate tests. The nitrogen-fixing bacteria are either greatly reduced in number or completely killed by actinomycete cultures during incubation together in various mixtures of soil and fertilizers and crop residues. The data emphasize the importance of microbial antagonism as a factor to be considered in theoretical ecology as well as in practical agriculture.
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