A gram of charcoal has about 400 sq meters of surface area. It can soak up 5 times it’s weight in water and life.
Karen Walk wrote:
I saw thinking about using biochar to absorb excess nutrients from ducks in a pond. Basically place biochar in sacks in the water, wait a few weeks and then use in the garden, food forest or hugel beds.
John Suavecito wrote:Jaimie-
There are many, many threads on these topics. I can't cover them all, but I will add a couple of points. Even if you have reasonably good soil, but it tends toward clay, biochar can help a lot. Clay doesn't drain well, so plants can die and get sick because the roots can't get enough oxygen to breathe. Biochar improves drainage immensely.
I also live in a place with hot dry summers. Biochar can also retain some moisture so that even during the summer, your roots can get water, which is crucial. Biochar is ultimately crushed, not necessarily into powder, but into something like 1-2 cm pieces, like gravel. Then it should be inoculated if you want it to help right away instead of sucking away the nutrients into itself.