Table 2.
Two-way ANOVA on the effects of pre-drying method, temperature, and heating duration on water absorption of mangium, sengon, and jabon wood at 95% confidence level

Absorption
	Jabon		Sengon		Mangium
	F	P-value	F	P-value	F	P-value
	Pre-drying	0.358	0.552 ns	156.998	0.000**	41.765	0.000**
Temperature	5.003	0.010*	33.413	0.000**	10.730	0.000**
Time	19.272	0.000**	58.418	0.000**	39.519	0.000**
Pre-drying × temperature	1.572	0.217 ns	10.972	0.000**	7.006	0.002**
Temperature × time	3.073	0.024*	8.486	0.000**	1.267	0.294 ns
Pre-drying × time	0.088	0.916 ns	7.981	0.001**	3.938	0.025*
Pre-drying × temperature × time	3.911	0.007**	3.405	0.015*	1.405	0.245 ns

significant effect (P<0.05);
very significant effect (P<0.01); ns, not significant effect.