Table 5. Analysis of variance of the effects of slag-based silicon fertilizer (slag) and application rate of Si (Si-R) on Si concentrations in rice organs (SiO₂%).

		F values
Sources of variation	Df	Leaf	Stem	Grain
Slag	1	2.09 ns	21.05**	0.602 ns
Si-R	3	30.93**	18.51**	13.74*
Slag×Si-R	3	1.80 ns	7.56*	0.786 ns

Levels of probability: ns  =  non significant, significantly different *p≤0.05 and **p≤0.01