The dehydrogenase activity (DHA) has been proposed as a measure of overall microbial activity and used as index of the soil microbial biomass. DHA is measured by two methods using TTC and INT as substrate, however, various authors reported poor results when TTC is used as substrate.
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Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/dehdrogenase-activity-natural-and-mine-soil-review
[2] http://admin.indiaenvironmentportal.org.in/category/author/s-k-maiti
[3] http://admin.indiaenvironmentportal.org.in/category/author/sangeeta-mukhopadhyay
[4] http://admin.indiaenvironmentportal.org.in/category/journal/indian-journal-environmental-protection
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-capability
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-science
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/micro-organisms
