Response of yield and agronomic output of Bangabandhu dhan100 under varying sowing window in cold prone Rangpur region

Background: Selection of a suitable planting time is one the key factors for obtaining desirable rice grain yield. This study focuses on effect date agronomic traits and provides useful information an optimal window to maximize yield Bangabandhu dhan100 in cold-prone Rangpur region, Bangladesh Methods: The was conducted at regional station farm Rice Research Institute from October 2021 June 2022. selected cultivar seeded eight different dates 15-day interval, starting 16. Time series data parameters including seedling biomass, leaf number seedlings, tiller per plant were collected interval. Result: A good relationship found between accumulated GDD (growing degree days) associated plant, highest observed with early seeding. Similarly, biomass depended GDD, it be higher seeding than late tillering pattern influenced by reached its peak 60 days after all dates. (368/plants) when planted December 1. Total showed increasing trend maximum 13.9 t/ha 1 planting. Planting significantly yields, yields during plantings 16 December; gradually decreased advancement finding provided idea selection Bangladesh.