RESPONSE OF WHEAT TO DIFFERENT PLANTING DATES AND SEEDING RATES FOR YIELD AND YIELD COMPONENTS

A study was designed to investigate the effects of various sowing dates and seeding rates on the yield and yield components of wheat (Triticum aestivem L.). The experiment was conducted at Agricultural Research Institute (ARI), Tarnab Peshawar during Rabi 2007-2008. Factor A including four planting dates (1 st November, 15 th November, 1 st December and 15 th December) were allotted to main plots while factor B including three seeding rates (100, 150 and 200 kg ha -1 ) were applied to sub plots. Wheat variety Pirsabak 2005 was used for the experiments. Both sowing dates and seeding rates affect the yield and yield components of wheat. Significant differences were found among the planting dates for number of grains spike -1 , 1000 grain weight, biological yield and grain yield. Maximum number of grains (53.99) spike