Mst. Masuma Akhter - Agronomy Division, Wheat Research Centre (BARI), Dinajpur, Bangladesh
Ayman EL Sabagh - Department of Agronomy, Faculty of Agriculture, Kafrelsheikh University, Egypt
Md. Nur Alam - Agronomy Division, Wheat Research Centre (BARI), Dinajpur, Bangladesh
Md. Kamrul Hasan - Department of Agronomy, Hajee Mohammad Danesh Science and Technology University, Bangladesh
Emad Hafez - Department of Agronomy, Faculty of Agriculture, Kafrelsheikh University, Egypt
Celaleddin Barutçular - Department of Field Crops, Faculty of Agriculture, Cukurova University, Turkey
Mohammad Sohidul Islam - Department of Agronomy, Hajee Mohammad Danesh Science and Technology University, Bangladesh

An experiment was conducted with three seed rates (۱۰۰, ۱۲۰ and ۱۴۰ Kg ha-۱) and five varieties (BARI Gom ۲۴, BARI Gom ۲۵, BARI Gom ۲۶, BARI Gom ۲۷ and BARI Gom ۲۸) in the rabi season of ۲۰۱۲-۱۳ in the research field of Wheat Research Centre, Bangladesh Agricultural Research Institute, Dinajpur, Bangladesh to determine the optimum seed rate for newly released varieties. As factorial arrangement the experiment was laid out in a randomized complete block design with three replications. All agronomic practices were applied as per recommendation. The highest grain yield was found in BARI Gom ۲۶, which is medium sized seeded variety. The bolded seeded variety BARI Gom ۲۴ and BARI Gom ۲۵ failed to produce higher grain yield due to lower number of spikes per m۲ and lower number of grains per spike. A seed rate of ۱۴۰ kg ha-۱ produced the highest yield traits and grain yield across all the varieties, but there was no statistical difference with the seed rate of ۱۲۰ kg ha-۱. The performance of yield traits and yield of the wheat varieties varied with the seeding rates. Therefore, the seed rate of the variety BARI Gom ۲۴, BARI Gom ۲۶ and BARI Gom ۲۸ can be considered as ۱۴۰ kg seed ha-۱ and the variety BARI Gom ۲۵ and BARI Gom ۲۷ can be considered as ۱۲۰ kg seed ha-۱.An experiment was conducted with three seed rates (۱۰۰, ۱۲۰ and ۱۴۰ Kg ha-۱) and five varieties (BARI Gom ۲۴, BARI Gom ۲۵, BARI Gom ۲۶, BARI Gom ۲۷ and BARI Gom ۲۸) in the rabi season of ۲۰۱۲-۱۳ in the research field of Wheat Research Centre, Bangladesh Agricultural Research Institute, Dinajpur, Bangladesh to determine the optimum seed rate for newly released varieties. As factorial arrangement the experiment was laid out in a randomized complete block design with three replications. All agronomic practices were applied as per recommendation. The highest grain yield was found in BARI Gom ۲۶, which is medium sized seeded variety. The bolded seeded variety BARI Gom ۲۴ and BARI Gom ۲۵ failed to produce higher grain yield due to lower number of spikes per m۲ and lower number of grains per spike. A seed rate of ۱۴۰ kg ha-۱ produced the highest yield traits and grain yield across all the varieties, but there was no statistical difference with the seed rate of ۱۲۰ kg ha-۱. The performance of yield traits and yield of the wheat varieties varied with the seeding rates. Therefore, the seed rate of the variety BARI Gom ۲۴, BARI Gom ۲۶ and BARI Gom ۲۸ can be considered as ۱۴۰ kg seed ha-۱ and the variety BARI Gom ۲۵ and BARI Gom ۲۷ can be considered as ۱۲۰ kg seed ha-۱.

Seed rate, Varieties, Seed size, Yield, Wheat