Table 5. Mean nutrient contents (mean ± standard error) of all potato accessions in two growing seasons (N = 603), three locations and four flesh colors (N = 542).

N = 603		2013	2014	CV-2013	CV-2014	P Value	LSD
K	g kg−1	28.62 ± 0.35a*	15.32 ± 0.19b	29.6	29.7	0.001	0.614
P			3.17 ± 0.03a	3.18 ± 0.03a	22.8	20.3	0.654	0.072
Ca			0.32 ± 0.00b	0.35 ± 0.00a	28.4	27.2	0.001	0.01
Mg		1.20 ± 0.01a	1.16 ± 0.01b	19.9	23.6	0.001	0.024
Fe	mg kg−1	18.56 ± 0.22b	33.41 ± 0.4a	29.2	33.9	0.004	0.818
Zn			26.16 ± 0.31a	25.65 ± 0.36a	29	34.5	0.242	0.764
Cu			7.61 ± 0.07b	8.33 ± 0.08a	21.3	23.6	0.001	0.196
Mn		6.53 ± 0.05b	7.44 ± 0.06a	18.9	20.3	0.001	0.149

Notes.

^*Means followed by different letters are significantly different by each other P < 0.05. LSD is at 0.05 significance level.

CV

Coefficient of variation (%)

Locations: N, Niksar; K, Kazova; A, Artova, Colors: LY, Light yellow; DY, Dark yellow; C, Cream; W, White.