I read the article below from "magcap.com" that mentioned usable electric power can be obtained from trees. Usable in this case is quite small.
http://www.magcap.com/pdf/Release2006_09_26V1_02.pdf
The above report did not provide a reference to MIT study but did indicate the researchers eliminated dissimilar metals as the cause.
I found a few other scientific publications that were measuring the bioelectric potentials and how they change daily and seasonally. The web site below contains lots of comments about what the readers think is happening.
The New Power Plants¯: Trees Make Electricity? (TreeHugger)
The comments of most of the readers of the above assume the potential was caused by dissimilar metals, even though the "magcap" article stated this was accounted for.
The report below also eliminated dissimilar metals as being the cause of the current.
http://volcanum.geosciences.univ-ren...ience_2006.pdf
Any other pertinent studies in this area?
