Effect of split application of nitrogen and interaction effect of nitrogen and plant population on growth and yield of sunflower (Helianthus annuus L.) – A review

Sunflower is an important oilseed crop which ranks third in the world next to soybean and groundnut in the edible oil production. The productivity of sunflower can be increased with judicious use of inputs under higher plant population levels. Split application of N has been reported to favourably influence the nutrient uptake, growth, yield characters and seed yield of sunflower. In general, crop growth and dry matter accumulation of sunflower are higher at increased N and population levels. Reports of higher sunflower yield at higher plant population and N levels have been widely reported.