The two-way ANOVA results on effects of type and rate of organic amendment on roots heavy metals, shoots heavy metals and available of heavy metals in soil.

Heavy metals concentration	Type of organic amendment		Rate of organic amendment		Type of organic amendment × rate of organic amendment
	F	p	F	p	F	p
Roots heavy metals
Cd	10.84	<0.01	218.97	<0.01	1.95	0.11
Zn	236.68	<0.01	832.54	<0.01	67.43	<0.01
Cu	114.59	<0.01	4268.09	<0.01	78.94	<0.01
As	45.41	<0.01	586.30	<0.01	32.36	<0.01
Shoots heavy metals
Cd	1.05	0.37	129.45	<0.01	0.32	0.92
Zn	2.14	0.14	724.13	<0.01	9.72	<0.01
Cu	17.05	<0.01	2112.61	<0.01	19.71	<0.01
As	58.12	<0.01	39.11	<0.01	8.21	<0.01
Available of heavy metals in soil
Cd	1.94	0.17	194.04	<0.01	0.81	0.57
Zn	15.84	<0.01	81.94	<0.01	2.96	0.03
Cu	1.92	0.17	20.77	<0.01	1.32	0.29
As	6.39	<0.01	10.98	<0.01	2.40	0.06