A field experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University from November 2016 to March 2017 to find out the effect of irrigation regimes and nitrogen (N) fertilization on the yield performance of spring wheat. The experiment was comprised five levels of irrigation viz., no irrigation (I0); CRI (crown root initiation stage) (I1); CRI + maximum tillering stage (I2); CRI + maximum tillering stage + flowering Stage (I3); CRI + maximum tillering stage + flowering stage + grain formation stage (I4); and six levels of nitrogen viz., 0, 60, 80, 100, 120 and 140 kg ha -1 under Split Plot design with three replicates. Except few all the yield contributing characters and yield of wheat were significantly influence by the application of irrigation and nitrogen. The highest number of total tillers hill -1 (4.15), effective tillers hill -1 (3.63), number of spikelets spike -1 (14.67), grain yield (2.862 t ha -1 ), straw yield (3.45 t ha -1 ), biological yield (6.312 t ha -1 ) and harvest index (45.34%) were obtained from two irrigation at CRI+ Maximum tillering stage. In nitrogen management, the highest plant height (91.17 cm), number of spikelets spike -1 (15.24), number of grains spike -1 (44.46), spike length (10.89 cm), grain yield (2.93 t ha -1 ), straw yield (3.478 t ha -1 ) and biological yield (6.408) and harvest index (45.72%) were obtained from application of 120 kg N ha -1 . In interaction, the highest grain (3.897 t ha -1 ), straw (4.76 t ha -1 ) and biological yield (8.661 t ha -1 ) and harvest index (45.02%) were achieved from two irrigation at CRI + maximum tillering stage with application of 120 kg N ha -1 . The lowest grain yield (1.22 t ha -1 ) was achieved from one irrigation at CRI with no nitrogen application. Whereas, the lowest straw (2.13 t ha -1 ) and biological yield (3.78 t ha -1 ) were achieved from no irrigation with 60 kg N ha -1 . Based on these results it may conclude here that farmers may apply two irrigations (one at CRI and another at maximum tillering stage) with 120 kg N ha -1 to obtain the higher yield of wheat under Bangladesh context.

Binadhan-19Row spacing Plant densityYield attributes Yield An experiment was conducted at the experimental farm of BINA Sub-station, Gopalganj to determine the effect of spacing on the yield and yield attributing parameters of rice. Four spacings viz. 15 cm × 15 cm, 20 cm × 15 cm, 20 cm × 20 cm and 25 cm × 20 cm were included in the study. The experimental design was a randomized completely block with three replications. Spacing's 15 cm × 15 cm, 20 cm × 15 cm, 20 cm × 20 cm and 25 cm × 20 cm were adopted 49, 42, 36 and 30 hills per square meter, respectively. Results revealed that different spacing performed significantly differed yield contributing characters (plant height, panicle length, number of effective and non-effective tillers, number of filled and unfilled grain, grain and straw yield of rice. Results indicated that the highest plant height (83.40 cm), panicle length (19.73), number of effective tillers per hill (11.00), number of total grains per panicle (87.73), number of filled grains per panicle (70.53), root length (16.07 cm), root weight (38.00 g per five plants), harvest index (38%), grain yield (4.19 t ha -1 ) and straw yield (4.50 t ha -1 ) were found with 25 cm × 20 cm spacing. On the other hand, maximum number of non-effective tillers per hill (1.60) was found in 15 cm × 15 cm spacing. Results of the present study revealed that 25 cm × 20 cm spacing was found to be the best for obtaining maximum grain yield of aus var. Binadhan-19.