Fig. 4From: The phytolith carbon sequestration in terrestrial ecosystems: the underestimated potential of bamboo forestComparison of aboveground phytolith and PhytOC (carbon occluded in phytoliths) in different ecosystems. The bar chart represents the difference between cropland and grassland. *, ** and *** denote significant at p < 0.05, p < 0.01 and p < 0.001 levels, respectivelyBack to article page