sol (1) mise sous sequestre (1) herbe (1) cycle du carbone (1) carbone (1) Claims (1) Methods (1) Phytoliths (1) Antiquities, Prehistoric (1) Origin (1) Soils (1) Silica (1) Play (1) Plant cells and tissues (1) Particles (1) Prehistoric peoples (1) Hypothesis (1) Humus (1) Grasslands (1) Evidence (1) Claims (1) Carbon--Isotopes (1) Carbon (1) Properties (1) Methods (1) Particles (1) Origin (1) silice (1)