“…In fact, silica structures synthesized by, for example protists, sponges, and plants, form protistic, zoogenic, and PhSi pools in soils, respectively (Puppe et al, 2015). These pools represent various sources of DSi in agricultural soils (Haynes, 2017), because biogenic silica has a much higher dissolution rate than silicate minerals (Fraysse, Pokrovsky, Schott, & Meunier, 2006 1963), which return to soil within plant debris (Smithson, 1956). Soil phytoliths readily dissolve at common pH values of soil solution (Fraysse et al, 2006(Fraysse et al, , 2009, and thus contribute to feed the reservoir of plant-available Si (Alexandre, Meunier, Colin, & Koud, 1997;Bartoli, 1983;Farmer, Delbos, & Miller, 2005;Keller, Guntzer, Barboni, Labreuche, & Meunier, 2012;Li, Song, & Cornelis, 2014;Marxen et al, 2016;Meunier, Guntzer, Kirman, & Keller, 2008;Riotte et al, 2018;Unzué-Belmonte et al, 2016;Yang & Zhang, 2018).…”