Table 3.
Properties of composite boards made at different mixing ratio

Denstiy(g/㎤)	Mixing ratio*1	RF		MOR		dMOE		sMOE
		(Hz)	p-value	(MPa)	p-value	(MPa)	p-value	(MPa)	p-value
0.6	50:35:5	295.39(38.88)	0.000	4.69(1.57)	0.000	1026.45(323.66)	0.000	361.15(73.02)	0.000
	50:30:10	248.93(53.03)		2.68(1.15)		798.05(338.26)		214.51(86.83)
	50:25:15	238.92(23.81)		2.42(0.75)		643.7(140.93)		178.28(54.79)
	50:20:20	205.02(31.45)		1.81(0.59)		456.3(159.76)		136.13(43.65)
*1: mixing ratio (sawdust : rice husk : charcoal)RF: resonant frequencyMOR: modulus of rupturedMOE: dynamic modulus of elasticitysMOE: static modulus of elasticity