The aim of this study is to measures the student's perception of using mobile for learning during COVID-19 in Bangladesh especially at the university student's perspective. During the COVID-19 pandemic period, mobile learning may help the students to fulfill the study gap. Due to COVID-19 pandemic 213 countries, higher education has affected all over the world of June 2020. Although all of the developed countries considered mobile learning as an effective tool for education, it is not used properly in Bangladesh. This survey method conducted on 416 students from different university students in Bangladesh to understand the student's perception of using mobile phones as a learning system. The findings of this study show that most of the students at the university level have a positive perception of m-learning. This study revealed that m-learning is very helpful to recover the study gap during this COVID-19 pandemic time and the findings of this study will help the education policymaker as well as the educational institutions to incorporate mobile learning technology for the whole system where social media may enhance the process of teaching and learning.

After a long waited span, the whole world could see the ray of covid-19 vaccine to resist the planet to watch the death procession. But some country people especially the people of Bangladesh keep them aside to take the vaccination. This study aims to understand the perception towards the COVID-19 vaccination program in Bangladesh and the targeted subject is the university student as they are suffering highly depression nowadays. Higher education has been affected globally as a result of the COVID-19 pandemic in 223 countries. Moreover, for this pandemic situation, the university students can not complete their graduation which binds them to enter their professional career. Alike all of the developed countries, as well as developing countries, Bangladesh, also considered vaccination as an effective measure to protect the peoples from the Covid-19 virus. This study targeted three psychological factors of the university students and surveyed 322 students from the different universities in Bangladesh to understand their perception regarding vaccines. Moreover, it is seen that most of the students doubt the effectiveness of the vaccine which interrupts them from taking the vaccine willingly.

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After a long waited span, the whole world could see the ray of covid-19 vaccine to resist the planet to watch the death procession. But some country people especially the people of Bangladesh keep them aside to take the vaccination. This study aims to understand the perception towards the COVID-19 vaccination program in Bangladesh and the targeted subject is the university student as they are suffering highly depression nowadays. Higher education has been affected globally as a result of the COVID-19 pandemic in 223 countries. Moreover, for this pandemic situation, the university students can not complete their graduation which binds them to enter their professional career. Alike all of the developed countries, as well as developing countries, Bangladesh, also considered vaccination as an effective measure to protect the peoples from the Covid-19 virus. This study targeted three psychological factors of the university students and surveyed 322 students from the different universities in Bangladesh to understand their perception regarding vaccines. Moreover, it is seen that most of the students doubt the effectiveness of the vaccine which interrupts them from taking the vaccine willingly.

An experiment was conducted at the research field of Agronomy Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during the rabi season of 2013-2014 to find out the optimum dose of herbicide (Teana 9 EC) to control weeds in brinjal field for getting higher yield. Six treatments, viz.: (i) Teana 9 EC @ 750 ml ha-1 spraying on 15 DAS and 45 DAS, (ii) Teana 9EC @1000 ml ha-1 spraying on 15 DAS and 45 DAS, (iii) Teana 9EC @ 1250 ml ha-1 spraying on 15 DAS and 45 DAS, (iv) Teana 9EC @ 1500 ml ha-1 spraying on 15 DAS and 45 DAS, (v) two hand weddings, and (vi) no weeding (control) were used in the experiment. Among the weed species, Bathua (Chenopdium album), Durba (Cynodon dactylon), Anguli (Digitaria sanguinalis), Helencha (Jussiaea repens), Hatishur (Heliotropium indicum), Shama (Echinochola crusgalli), Swetlomy (Gnaphalium japonicum), Mutha (Cyperus rotundus), Shaknote (Amaranthus viridis), Gaicha (Paspalum commersonii), Chapra (Eleusine indica), Bon Masur (Vicia sativa) were found dominant in wheat field. The result showed that the highest dry weight of weeds at 30 and 60 DAS were 12.24 and 24.12 gm-2 in control plot, whereas the lowest weed dry weight was observed in two hand weedings. The maximum weed control efficiency over control both at 30 and 60 DAS were 79.41 and 74.32%, respectively in the treatment with two hand weedings. The highest number of fruits plant-1, single fruit weight (g), fruit length (cm) and yield (t ha-1) was found in the treatment having two hand weedings and the lowest in no weeding (control). Though the weed control efficiency (WCE) was the highest in the treatment with two hand weedings due to higher labor cost but the maximum benefit cost ratio was the highest when Teana 9EC @ 1500 ml/ha was sprayed two times on 15 and 45 DAS.Bangladesh Agron. J. 2015, 18(1): 113-119