Abstract
Potassium is one of the major nutrients whose deficiency decreased the growth and yield of canola. Current knowledge
regarding K requirement of canola is limited. Thus the field study was carried out to assess the influence of different levels of
K fertilization (0, 30, 60, 90,120 kg ha-l) on two canola cultivars viz. Bulbul-98 and Zafar-2000. Results revealed that
increasing rate of K enhanced leaf area index and crop growth rate in both cultivars. Highest seed yield (3067.24 kg ha-l) was
obtained when K was applied at 120 kg ha-l. While minimum seed yield (2353.85 kg ha-l) was recorded in case of control.
Variety, Zafar-2000 produced more seed yield than Bulbul-98. Oil content progressively decreased with increase of K level
with highest (42.46%) in case of control and lowest (39.25%) with a K level of 120 kg ha-l. Similarly Zafar-2000 and Bulbul98 produced 40.80% and 41.04% oil contents, respectively. From these results, it is concluded that potassium application at
the rate of 120 kg ha-l increased the growth, yield, and oil quality of canola.
