Tariful Alam Khan, Mst Monira Khatun, Bitopi Biswas, Dibbya Roy, Subha Azad, Mst. Fatimatu Zohura Mina, Jerin Sultana, A. M. Shahidul Alam, M. Robiul Islam and Mesbaus Salahin

Abstract: An investigation was carried out at the Agronomy Field Laboratory, Department of Agronomy and Agricultural Extension, University of Rajshahi, from December 2019 to March 2020 to study the effect of split urea application on growth yield contributing characters and yield of wheat. Two varieties of wheat (V₁=BARI Ghom-26, V₂=BARI Ghom-28) and four levels of urea were used as experimental treatment; T₁ (whole amount of urea applied as basal dose), T₂ (urea applied in 2 equal splits at basal and 20 DAS), T₃ (urea applied in 3 equal splits at basal, 20 and 40 DAS), and T₄ (urea applied in 4 equal splits at basal, 20, 40 and 60 DAS). The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Results revealed that wheat varieties were influenced significantly due to split urea application. Different yield parameters like number of effective tillers/plant (6.28), spike length (10.56cm), number of spikelet's spike¹ (20.61), number of grains spike¹ (51), 1000-grains weight (46.01 g), grain yield (2.59 t ha¹), straw yield (3.32 t ha¹), biological yield (5.91 t ha¹) and harvest index (43.78 %) were highest in T_4.Interaction of V₂ with T₄ showed highest results in case of all yield parameters like number of effective tillers/plant (6.55), spike length (10.67 cm), number of spikelet's spike^-1 (20.89), number of grains spike (52.00), grain yield (2.64 t ha¹), straw yield (3.37 t ha¹), biological yield (6.01 t ha¹) From the above results, it can be concluded that BARI Gom-28 with application of urea at 4 splits is better for growth and yield of wheat.

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Effect of Planting Date and Variety on Yield and Yield Attributes of Potato in the Rangpur Region of Bangladesh

N. M. Alamgir Badsha, Md. Abdul Alim, Md. Belal Hossain and Md. Mahmodol Hasan

Abstract: A field experiment was carried out at the Agronomy Farm, Agricultural Training Institute, Tajhat, Rangpur, Bangladesh during the period from November 2019 to March 2020 to study the effect of sowing date on the performance of potato varieties. Four potato varieties viz. BARI potato 25, BARI potato 28, BARI potato 29 and BARI potato 57 were sown at 10-day intervals starting from 20 November to 10 December 2019 to identify the suitable variety and optimum sowing date for getting maximum yield. Among the varieties BARI potato 57 was ranked first in terms of tuber yield (33.45 t ha^-1) and the lowest tuber yield (22.82 t ha^-1) was obtained from   BARI potato 29. The highest tuber yield (32.64 t ha^-1) was obtained from the date of sowing 20 November followed by 30 November (27.72 t ha^-1) and the date of sowing 10 December produced the lowest tuber yield (18.90 t ha^-1). BARI potato 57 yielded the highest tuber yield (42.05 t ha^-1) when sown on 20 November followed by 30 November with BARI potato 57 (35.19 t ha^-1) and BARI potato 25 sown in 10 December produced the lowest tuber yield (16.80 t ha^-1). Thus, it could be concluded that varietal and environmental variations as well as their combination had considerable influence on tuber yield and the potato’s attributes. Therefore, considering all results the first date of sowing 20 November BARI potato 57 could be recommended to the potato growers of Rangpur region.

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