Table 2. Average Si concentration of cultivated crop biome, weighted by the mass of the four most produced crops [19].

Order	Genus	% Siby wt	Mass of Crop(Million Tons)	Si(Million tons)
Poales	Saccharum	0.54	1685	910
Poales	Triticum	2.42	650	1573
Poales	Zea	0.79	844	667
Poales	Oryza	3.17	672	2130
Total			3851	5280
Average Si concentration				1.37