|The number 1
|Can we really be
confident that the addition of charcoal to soil will help increase its
fertility. Studies of the Terra Preta soils over the years have provided
substantial evidence that fertility is improved at least in the tropics.
There is evidence of human caused soil
improvement here in Canada too - going back thousands of years to the last
and researhers are now experimenting with a lot of enthusiasm.
seems to me it will take a long time and a lot of controlled science based
work to evaluate the process in terms
of increased fertility and productivity over the long term. Several decades
of discovery seems warranted in view of the potential for climate change we
are facing whether warming or cooling is associated with it.