Constituents
weight
Silica (SiO
2
)
94.50
Calcium oxide (CaO)
00.48
Manganese oxide (MnO)
01.09
Magnesium oxide (MgO)
00.23
Iron oxide(Fe
2
O
3
)
00.54
Aluminum oxide(Al
2
O
3
)
00.21
S,P
2
O
5
,K
2
O,Na
2
O
Traces
Table 1:
A typical composition of rice husk
