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Abstract
BRRI dhan29, a high yielding inbred variety, was grown in boro season on five different dates of transplanting viz. 1 January, 10 January, 20 January, 30 January and 10 February under four levels of nitrogen i.e. 80, 100, 120 and 140 kg ha-1 at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh in 2005-2006 aimed at assessing the influence of dates of planting and nitrogen level on different crop characters and yields of grain and straw of rice. Grain yield of rice planted on 20 January was highest (4.99 t ha-1) due to highest number of grains panicle-1 (130.7) and 1000-grain weight. The lowest yield (3.77 t ha-1) was obtained from 10 February and was at par with 1 January ones. Grain yield registered an increasing trend upto 120 kg N ha-1 (4.93 t ha-1) but differed significantly form second highest (4.30 t ha-1) yield obtained from 140 kg N ha -I. The lowest grain yield (3.91 t ha -I) was recorded from 80 kg N had. Straw yield was also found the highest (5.82 t ha-1) from 120 kg N ha-1 The second highest nitrogen level (120 kg ha-1) interacted favourably with 20 January plantation to give highest grain and straw yields (5.59 and 6.25 t ha-1, respectively). Considering grain and straw yields and total growth duration transplanting on 20th January with 120 kg N ha-1 was found to appear more appropriate within the per view of the study area.