Abstract
ATTEMPTS to estimate the numbers of nitrifying organisms in soil have usually been made by some form of dilution technique involving culture of the dilutions in liquid media in tubes (see ref. 1). The number of dilutions, and of replicate tubes at each dilution, that are necessary to give reliable estimates, makes this method extravagant of material and time.
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References
Stevenson, I. L., and Chase, F. E., Soil Science, 76, 107 (1953).
Singh, B. N., Ann. App. Biol., 33, 112 (1946).
Fisher, R. A., and Yates, F., “Statistical Tables for Biological, Agricultural and Medical Research”, 2nd edit., Table VIII2 (Oliver and Boyd, London, 1943).
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MILLBANK, J. Estimation of Numbers of Nitrosomonas in Soil and Culture. Nature 177, 848–849 (1956). https://doi.org/10.1038/177848a0
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DOI: https://doi.org/10.1038/177848a0
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