Khandoker Khalid Ahmed¹, Mir Mehedi Hasan^1*, Muhammad Habibur Rahman Mukul¹, Shamsunnaher¹, Afruz Zahan¹, Md. Niaz Morshed¹, AAMM Mustakim²

¹Adaptive Research Division (ARD), Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh
²Plant Physiology Division (PPD), Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh

This study assessed the performance and stability of two advanced rice genotypes, BR9930-2-3-2-2 (V1) and BR9930-2-3-3-1 (V2), compared to three standard varieties- BRRI dhan50 (V3), BRRI dhan63 (V4), and BRRI dhan81 (V5)-across ten agro-ecological zones during the 2021-22 Boro season in Bangladesh. A randomized complete block design (RCBD) was employed with three replications per site to evaluate grain yield, agronomic traits, and genotype-environment interactions (GEI) using AMMI and GGE biplot models. The study revealed significant GEI effects on grain yield, highlighting environmental variability and genotype-specific adaptability. V1 achieved the highest mean yield (6.57 t/ha) with superior performance in several environments, while V2 displayed consistent stability across diverse agro-ecological zones with a mean yield of 6.49 t/ha. The GGE biplot identified V1 as suitable for targeted environments and V2 as the most stable genotype, making it ideal for broader cultivation. These findings underscore the potential of the advanced genotypes for sustainable rice production, particularly in meeting the demand for high-yielding, premium-quality rice in Bangladesh. Further multilocation trials are recommended to validate the stability and adaptability of these genotypes for potential variety release.

Keywords: Rice, premium quality, AMMI, GGE biplot, genotype-environment interaction, grain yield, stability.

Corresponding author.
E-mail address: kkahmedbrri@gmail.com (Khandoker Khalid Ahmed)

How to cite this article: Ahmed KK, Hasan MM, Mukul MHR, Shamsunnaher, Zahan A, Morshed MN and Mustakim AAMM (2025). Performance and stability of premium quality rice varieties in multi-environment trials using AMMI and GGE biplot during the Boro season in Bangladesh. International Journal of Natural and Social Sciences, 12(1): 01-12. DOI: 10.5281/zenodo.14728939.

M. Golam Mahaboob¹, Md. Eakramul Haque², Md. Zahidul Haque³, Md. Shahadat Hossain⁴, Nashir Uddin Mahmud⁵, AKMM Rahman⁶

¹Principal Scientific Officer, BARC, Farmgate, Dhaka, ²Scientific Officer, OFRD, BARI, Rangpur, ³Agriculture Expert, CEGIS, ⁴Agronomist, DCSC, Bangladesh Water Development Board, ⁵Senior Scientific Officer, RARS, BARI, Jessore, ⁶Senior Scientific Officer, PRSS, BARI, Gazipur

The experiment was conducted during rabi season 2019-2020 at Agricultural Research Station, On Farm Research Division, Alamnagar, Rangpur to find out the useful effects of organic fertilizer on growth and yield of tomato. The experiment was arranged in a randomized complete block design (RCBD) with five treatments in three (03) compacted replicate blocks. The treatments included T₁: 100% Recommended Chemical Fertilizer (RCF), T₂: 85% CF + 3 tha^-1 organic Fertilizer (OF), T₃: 85% CF + 1 tha^-1 OF, T₄: 70% CF + 3 tha^-1 OF and T₅: 70% CF + 1 tha^-1 OF. The highest yield was observed in T₂ (52.22 t ha^-1) due to more number of fruit plant^-1& weight of fruit plant^-1 and the lowest was in T₅ (48.81 t ha^-1). The highest gross return (BDT. 626640 ha^-1) was found in T₂ treatment and the lowest gross return (BDT. 585720) was recorded from T₅. The highest gross margin (BDT. 358140 ha^-1) was obtained from T₁. The lowest gross margin (Tk. 310253 ha^-1) was obtained from T₅. Combinations of organic manure with mineral fertilizer resulted in a higher fruits yield than the sole mineral fertilizers. Based on the results, this study, recommends the use of organic manure with mineral fertilizers for improved tomato fruit yield while maintaining high soil fertility. Hence, the utilization of organic fertilizers, either alone or in conjunction with chemical fertilizer, markedly enhanced the growth and yield of the tested vegetable, offering viable strategies for enhancing the yield potential.

Keywords: Organic Fertilizer, Chemical Fertilizer, Tomato Yield, Growth Performance.

Corresponding author.
E-mail address: golam.mahboob@gmail.com (M. Golam Mahaboob)

How to cite this article: Mahaboob MG, Haque ME, Haque MZ, Hossain MS, Mahmud NU and Rahman AKMM (2025). Performance of organic fertilizer (Plorax Jaibo Sar) on yield and yield attributes of tomato. International Journal of Natural and Social Sciences, 12(1), 13–17. DOI: 10.5281/zenodo.15030451.

A. K. M. Harun-Or-Rashid¹, Parvez Anwar², Ahmed Khairul Hasan², Md. Romij Uddin², Md. Rezaul Amin³

¹Project Director, Development of Cotton Research and Technology Transfer Project, Cotton Development Board, Tula Bhabon, Krishi Khamar Sarok, Farmgate, Dhaka
²Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202
³Chief Scientific Officer, Cotton Development Board, Tula Bhabon, Krishi Khamar Sarok, Farmgate, Dhaka

This study investigates the impact of weed interference periods on the growth and yield of cotton, emphasizing the critical weed control period (CPWC) for effective management strategies. Conducted over two growing seasons, the experiment utilized three cotton varieties (CB-15, CB-hybrid-1, and Rupali-1) under varying weed interference durations. Treatments included season-long weed-free conditions and periods of weed interference starting at different growth stages. Results indicated that all varieties exhibited the highest seed cotton yield in continuous weed-free conditions, with Rupali-1 achieving optimal yield when maintained weed-free up to 60 days after sowing (DAS). Total dry weed weight increased with prolonged interference, adversely affecting cotton growth and height. Conversely, longer weed-free periods led to significant increases in above-ground biomass and overall plant height. The findings demonstrate that effective weed management, particularly during the early growth stages, is crucial for maximizing cotton yield. The CPWC was identified as essential for optimizing herbicide use and implementing alternative weed management strategies. The study concludes that keeping the cotton field weed-free up to 60 DAS was found necessary to get highest yield which is similar to season long weed-free condition. Removing weeds after 60 DAS brings no advantage in terms of cotton yield.

Keywords: Weed interference, Cotton, Varieties, Growth Performance.

Corresponding author.
E-mail address: kbdharun@gmail.com (A. K. M. Harun-Or-Rashid)

How to cite this article: Harun-Or-Rashid AKM, Anwar P, Hasan AK, Uddin MR and Amin MR (2025). Effect of different weed interference period on growth and yield performance of upland cotton varieties. International Journal of Natural and Social Sciences, 12(1), 18–31. DOI: 10.5281/zenodo.15062238.