One of the most important issues, that it should be considered is proper nutrition during growth of the crop. In addition, provide all the nutrients needed by plants sufficiently to produce more and better quality.In order to study the effect of potassium and zeolite on the seed, biological and, oil yield in an experiment in a factorial randomized complete block design with three replications conducted in the 2011-12. Potassium in these experiments in four levels (0, 50, 100, 150 kg/ha) and zeolite in two levels (0, 10 tons/ha) were studied. The attributes studied in this experiment, including seed yield, biological yield, harvest index (HI), and oil yield. Results showed that between the levels of potassium and zeolite and their interaction are significant at the 1% level. Maximum seed yield obtained with consuming maximum amount of potassium and zeolite (793.2kg/ha).
