Changes in N, K, and Fatty Acid Composition of Black Cumin Seeds Affected by Nitrogen Doses under Supplemental Potassium Application

Table 2

Main effects of N doses and supplemental K on seed yield, seed oil content, oil yield, and N and K contents in seeds of black cumin.

Year	Seed yield (kg ha^−1)	Seed oil content (%)	Oil yield (kg ha^−1)	N content (%)	K content (%)
2011				3.18
2012				3.11
Potassium (kg K2O ha^−1)
Control
50
Nitrogen (kg N ha^−1)
Control
30
60
90
Analysis of variance
Year (Y)				ns
Potassium (K)
Nitrogen (N)
K × N				ns	ns
Y × N	ns			ns	ns
Y × K	ns			ns	ns
Y × K × N		ns		ns	ns

and indicate significance at and , respectively; ns: not significant. †: means followed by the same letter(s) in each column are not significantly different at .