Table 5. Antioxidant activity of kale under conventional and organic cultivation systems

Samples		DPPH radical scavenging activity (%)	ABTS radical scavenging activity (%)	Reducing power
Conventional	A	59.82±0.75^1)c2)	71.88±0.68^b	0.80±0.01^d
	B	59.55±0.42^c	68.96±1.74^c	0.83±0.01^c
	C	60.16±0.54^c	65.87±1.47^d	0.70±0.00^e
Organic	D	63.42±0.40^a	75.79±0.55^a	0.85±0.00^bc
	E	62.01±0.60^b	75.76±0.62^a	0.86±0.03^b
	F	64.59±1.83^a	76.09±0.50^a	0.95±0.01^a

All values are mean±SD (n=3).
Means with different superscript letters (^a-e) in the same column are significantly different (p<0.05) by Duncan’s multiple range test.