Auxanography
Encyclopedia
Auxanography is the study of the effects of changes in environment
Environment (biophysical)
The biophysical environment is the combined modeling of the physical environment and the biological life forms within the environment, and includes all variables, parameters as well as conditions and modes inside the Earth's biosphere. The biophysical environment can be divided into two categories:...

 on the growth of microorganisms, by means of auxanograms. It was first devised by Beyerinck for testing the effect of various nutrient media upon bacteria.

The bacteria are plated out in a medium known to be poorly adapted for their nourishment, and then drops of the tested solutions are added to the surface of the plate. If the requisite nutrient has been added, the bacteria will develop rapidly in these spots.

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