The effect of different levels of plant densities and nitrogen on the agronomic characteristics of the indian mmustard (Brassica juncea L.)

The effect of different levels of plant density and the amount of nitrogen on some of the agronomic characteristics of the Indian mustard was analyzed in a split-plot study based on the randomized, complete block design (RCB) with three replications during 2009-2010 in the Agricultural Research Station of Takestan. In this experiment, the plant density in the subplots was analyzed at three levels of 80, 100, and 120 plant per square meter and different amounts of nitrogen fertilizer in the main plots were also investigated at five levels including 0, 50, 100, 150, and 200 kilogram per hectare. The results obtained from the variance analysis indicated that the plant density and different amount of nitrogen had significant effects on the seed and oil yields, 1000 seed weight, the harvest index, the biologic yield, and the percentage of the oil. The highest seed and oil yields (2961 and 1159 Kg/ha respectively) were obtained from the density of 80 plants per square meter and use of 200 Kg/ha nitrogen