Another promising study on the use of Terra Preta:
Agrichar is a black carbon byproduct of a process called pyrolysis, which involves heating green waste or other biomass without oxygen to generate renewable energy.via Science Blog
“When applied at 10t/ha, the biomass of wheat was tripled and of soybeans was more than doubled,” said Dr Van Zwieten.
“This percentage increase remained the same when applications of nitrogen fertiliser were added to both the agrichar and the control plots.
“For the wheat, agrichar alone was about as beneficial for yields as using nitrogen fertiliser only.
“And that is without considering the other benefits of agrichar.”
Regarding soil chemistry, Dr Van Zwieten said agrichar raised soil pH at about one-third the rate of lime, lifted calcium levels and reduced aluminium toxicity on the red ferrosol soils of the trial.
“Soil biology improved, the need for added fertiliser reduced and water holding capacity was raised,” he said.