songbird wrote:
ok, some results appear already.

all of the legumes are growing fine.
all rows of them are of the same height.

the buckwheat shows a decline in height
of a few inches in the zones where there
is charcoal mixed in the soil.

since i am not a chemist and cannot
test the soil itself directly i can only
guess that the difference is that the
charcoal is binding some of the nutrients
in the clay.

as a testable hypothesis, eventually i
expect the height to even out for the
buckwheat and the rest would remain the
same (the legumes).

too busy ATM to trim and post the
picture... not even sure it turned out
until i import it from the camera to
the computer. some day.


songbird

Do you have a pH test kit? If the charcoal contains much wood ash it will
raise the pH .

D