Ash from biomass boilers that contains high concentrations of carbon has been found to have biochar-like properties. Three experts describe the commercial use of high carbon wood ash as a compost additive, as a soil amendment for fertility and remediation, for stormwater filtration, and for traditional liming. High Carbon Wood Ash Applications & Potential Uses - Brian Coughlan, Wood Ash Industries, Ontario, Canada Public and private research has found that high carbon wood ash is a promising tool for environmental cleanup and in agricultural applications, with some of the same characteristics as biochar. High Carbon Wood Fly Ash as a Biochar Soil Amendment-Andrew Carpenter, Northern Tilth, Maine Northern Tilth studied high carbon fly ash blended with low fertility, slightly acidic top soil, among the results: the pH of the soil changed, but the plant tests suggested that there were no adverse effects. Biomass Boiler Biochar in Stormwater Filtration - John Miedema, Biological Carbon, Oregon Char from biomass boilers has applications in stormwater control, industrial roof drains, green roofs, erosion control, and bioswales.