Getting to the root of the matter: Water-soluble and volatile components in thermally-treated biosolids and biochar differentially regulate maize (Zea mays) seedling growth. oleh Rachel Backer, Michele Ghidotti, Timothy Schwinghamer, Werda Saeed, Claudia Grenier, Carl Dion-Laplante, Daniele Fabbri, Pierre Dutilleul, Philippe Seguin, Donald L Smith