RESPONSE OF RAPESEED (Brassica napus L.) VARIETIES TONITROGEN AND PHOSPHORUS FERTILIZER IN YIELD AND ITSCOMPONENTS UNDER TWO DIFFERENT SOWING

A field experiment was carried out during 2017, using factorial split- split- plotexperiment laid out in RCBD, to investigate the effect of planting date on plant height, seedyield kg ha-1and its components of two spring rapeseed (Brassica napus L.) varieties underthree N/P2O5 fertilizer levels. The results of experiment showed the tallest plant and greateryield and yield components (number of branches per plant, number of pod per plant, lengthof pod (cm), pods weight (g) per plant, number of seed per pod, 1000 seed weight (g),biological kg ha-1, and harvest index were obtained at earlier planting date (7th March) andunder 90/60 kg N/P2O5 ha-1fertilizer by Dunkild variety with values (105.40, 12.33,82.33,7.09, 7.08, 17.57, 3.13, 781.15, 266.19 and 0.34) respectively, for all mentionedparameters in comparison with Sherally variety under other N/P2O5 levels and late plantingdate.