Table 4. Total phenolics and ferric reducing antioxidant power expressed as slope of straight line (m) of ethanol extracts from the hop shoots of the different cultivars and sampling years.

		Cultivar
Parameter	Year	'Aurora'	'Celeia'	'Dana'	'Hallertauer Magnum'	‘Savinjski golding’	SEM	p-value
w(total phenolics as CAE)/	2010	0.742gf	0.674gf	1.790a	0.639gf	1.156cd		pC <0.001
(mg/g)	2011	1.131cd	0.857ef	1.054ed	0.684gf	1.482b	0.002	PY <0.016
	2012	0.823f	1.290cb	0.799gf	0.576g	1.059ed		pCxY <0.001
Ferric reducing	2010	0.0063c	0.0063c	0.0062c	0.0063c	0.0063c		pC <0.673
antioxidant power as m	2011	0.0060c	0.0066bc	0.0063c	0.0069bac	0.0066bc	0.0000	PY <0.003
	2012	0.0069bac	0.0070bac	0.0078a	0.0060c	0.0075ba		pCxY <0.001

SEM=standard error of the mean, C=effect of cultivar, Y=effect of year. Different letters within parameter indicate significant differences (p=0.05) between groups according to the interaction cultivar×year of production