Corydalis scouleri

Azotobacter Question and Answer June 2007
Richard Haard, Four Courner Nursery, Bellingham, Washington, June 11, 2007

Question by Sean Barry:
RH ". . .Learning about potential for enrichment culture of Azotobacter and trying to measure available nitrogen in this situation."

Here you mention promoting the growth of nitrogen fixing Azotobacter. I have always been interested in the possibility of inoculating charcoal with mycorrhizal fungi.

Do you think it might be possible that you could isolate, culture, and propogate enough of both types of microorganism species from the soil in your area, then enrich or inoculate charcoal with it, and put that charcoal into plant growth trials? I have seen some FDA ARS (Agricultural Research Service) documentation about developed and patented methods to do this (propogate soil fungi) kind of thing. The charcoal you have on the forest floor with the litter (I believe I've seen this picture); is it incorporated into the soil containing the fungus? Or just on top with the litter? Are there any plants growing in it? Are there also Azotobacter in that soil (along with the mycorrhizal fungi) ?

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