Well just in case this ends up being a solution to some mystery I’ve not come across, here’s a genuine (albeit seemingly pointless) finding from a research project I did a while back:

When saltwater is poured into the soil around the roots of a tomato plant, the plant’s internal electrochemical response oscillates with a 0.1hz frequency.

I’m not sure what mystery that will solve but now nobody can accuse me of not reporting/recording it!