This e-course introduces the FDA hydrolysis activity test. FDA is used for determine total microbial activity. This is a good general measure of organic matter turnover in natural habitats.
The e-course was made by Attila Zách M.Sc. student within the Soil Protection subject taught by Katalin Gruiz.
Source
Johan Schnürer and Thomas Rosswall, (1982 June), Fluorescein Diacetate Hydrolysis as a Measure of Total Microbial Activity in Soil and Litter, Applied and Environmental Microbiology, Vol 43(6), 1256-1261