Rajshahi University Journal of Life & Earth and Agricultural Sciences https://www.banglajol.info/index.php/RUJLEAS <p>An official journal of Rajshahi University. <br /><strong>History: </strong><br />1973-2009: ISSN 1681-0708 Rajshahi University Studies Part B, Journal of Science<br />2010-2012: ISSN 2309-1541 <a title="RUJS" href="/index.php/RUJS/index" target="_self">Rajshahi University Journal of Science</a><br />2013: ISSN 2309-0952 <a title="RUJSE" href="/index.php/RUJSE/index" target="_self">Rajshahi University Journal of Science and Engineering </a><br />AND<br />ISSN 2309-0960 Rajshahi University Journal of Life &amp; Earth and Agricultural Sciences</p> Rajshahi University en-US Rajshahi University Journal of Life & Earth and Agricultural Sciences 2309-0960 Copyright of published articles rests with the University of Rajshahi. Post-cyclone livelihood status and strategies in coastal Bangladesh https://www.banglajol.info/index.php/RUJLEAS/article/view/21623 The objective of this paper is to assess post-cyclone livelihood capitals status, identify major livelihood groups, adversity and crisis, and present the livelihood strategies of coastal households. Based on a questionnaire survey at household level, a total 331 out of 792 households are selected through simple random sampling from three purposively selected villages in the central coast of Bangladesh. Both descriptive and inferential statistics are used to analyse data. The present study identifies wage labour, fisher and farmer as major livelihood groups. Among the three villages, Island reveals less livelihood capitals than inland and shoreline. Although natural capital of Island is relatively higher, however, scarcity of other capitals hinders proper utilization of the potentials of such capital. Social capital of Island is significantly lower than other two villages, which unveils relatively lesser social coherence of Islanders, and which is most important to survive in post-cyclone situation. Likewise, among the livelihood groups, wage labourer owes less livelihood capitals than farmer and fishermen. Majority of the households irrespective of their village locations identifies recurrent cyclones and induced storm surges as major adversities which significantly destroys their livelihoods. Therefore, households in study villages diversify income sources wherever possible and most importantly while face the crisis. In general, livelihoods of Islanders and Shoreline villagers, wage labourer and fish fry collectors are most vulnerable to any cyclone events. Hence, the<br />present study advocates for identifying vulnerable locations and livelihood groups, and livelihood capitals building for such groups and promoting coordinated disaster risk reduction programs to mitigate cyclone impacts and providing assistance for rebuilding post-cyclone livelihoods. Shitangshu Kumar Paul ##submission.copyrightStatement## 2015-01-15 2015-01-15 41 1 20 10.3329/rujleas.v41i0.21623 Yield and yield components of wheat as affected by phosphorus fertilization https://www.banglajol.info/index.php/RUJLEAS/article/view/21624 The experiment was conducted at the Agronomy Field laboratory, Department of Agronomy and Agricultural Extension, University of Rajshahi to study the yield and yield components of wheat as affected by phosphorus fertilization. The experiment consisted of two factors i.e. (i) three wheat varieties viz., Shatabdi, Bijoy and Prodip and (ii) five levels of phosphorus viz. 0, 30, 60, 90, 120 kg P2O5 ha-1. A RCBD design was used for the experiment with three replications. The effect of variety was significant on all the yield components and yield except plant height. Prodip gave the highest grain yield (3.67 t ha-1) followed by Bijoy (3.45 t ha-1) and Shatabdi (3.28 t ha-1). Yield and yield components of wheat were significantly influenced by different levels of phosphorus. The highest grain yield (4.47 t ha-1) was recorded from P4 (120 kg P2O5 ha-1) and the lowest one (2.43 t ha-1) from the control treatment. The highest grain yield (4.80 t ha-1) was obtained from Prodip at 120 kg P2O5 ha-1 and the lowest one (2.3 t ha-1) was found in Shatabdi at control treatment. The results suggest that the combination of V3P4 (Prodip with 120 kg P2O5 ha-1) is the best for obtaining higher yield of wheat. M. S. Alam I. Jahan ##submission.copyrightStatement## 2015-01-15 2015-01-15 41 21 27 10.3329/rujleas.v41i0.21624 Adoption of production technologies by potato growers in northwest Bangladesh https://www.banglajol.info/index.php/RUJLEAS/article/view/21622 Determining the extent of adoption of modern variety potato production technologies by the potato growers was the main focus of the study. The study was conducted in the Rajshahi district. Out of 1547 potato growers, 232 respondents were randomly selected as a sample for data collection from twenty villages. A pre-tested interview schedule was used to collect data from the respondents during July 2010 to February 2011. For measuring the adoption of modern variety potato production technologies by the potato growers, 11 technologies on modern potato production were considered. Majority (46.55%) of the growers had medium adoption compared to high (29.74%) and low (23.71%) adoption. Among the extent of adoption of eleven selected technologies recommended ‘irrigation’ was at top highest ranking as indicated by the adoption index where as plant spacing was bottom lowest. The adoption variations in different technologies will not be improved unless effective steps are taken to increase growers’ exposure to get benefits of using such technologies as per recommendations. A. B. M. Sharif Uddin M. M. Rahman M. B. Alam M. H. K. Kamaly ##submission.copyrightStatement## 2015-12-19 2015-12-19 41 29 39 10.3329/rujleas.v41i0.21622 ‘Monga’ in northern region of Bangladesh: a study on people’s survival strategies and coping capacities https://www.banglajol.info/index.php/RUJLEAS/article/view/21620 The objective of this paper is to explore people’s survival strategies and coping capacities to combat monga at household level in the northern region of Bangladesh. The agriculture based rural economy, extreme poverty, high<br />percentage of landless, lack of sufficient caloric intake, unemployment of vast agricultural labour force etc. are the root causes of vulnerability to monga in the northern regions specifically few districts of greater Rangpur. Moreover, geographically this region is vulnerable to natural hazards such as floods and droughts. The past records of food shortages and famine reveal that the trend is still continuing in the monga-prone areas. The present study found that the most vulnerable groups in the monga-prone areas were agricultural wage labourers, landless and marginal farmers, female headed households, children, pregnant women and aged people. The present study also found that with a view to cope with the monga, various coping strategies such as selling of labour with advance payment at cheap rate, borrowing of money, selling of assets, looking for work in other areas, dependency on relief, selling of field crops in advance at cheap rate etc. were adopted by the affected households. The present study also found that coping capacity was associated with household head’s socio-economic status e.g. level of education, monthly income, types of occupation, etc. Vulnerability to monga was higher for the illiterate and low income groups than the educated and<br />high income groups. The present study argues that the policy makers of<br />Government and NGOs should emphasize on enhancing of coping capacities of poor and marginalized groups through rural centric development, rural<br />employment generation, maximum utilization of agricultural land, proper credit support and agro-based industrialisation in the northern Bangladesh. Shitangshu Kumar Paul Md. Nazir Hossain Shudarshan Kumar Ray ##submission.copyrightStatement## 2015-01-15 2015-01-15 41 41 56 10.3329/rujleas.v41i0.21620 Glass sand potentiality of bar sediments from Tista and Dharla rivers, Bangladesh https://www.banglajol.info/index.php/RUJLEAS/article/view/21625 The present investigation deals with the glass sand potentiality of the bar<br />sediments of Tista and Dharla rivers from different locations of Nilfamari,<br />Lalmonirhat and Kurigram districts, Bangladesh. Accordingly, fourteen samples<br />were selected for grain size distributions with separation of magnetic minerals.<br />Magnetic mineral content ranges from about trace amount to 0.06 wt%. Light<br />minerals separated by tetrabromoethane technique ranging from about 88 to 98 wt%. Moreover, glass sand as final products by flotation process evaluation<br />ranges from 58 to 80 wt%, which indicate good quantity of glass sand.<br />Geochemical data also suggest that glass sands are suitable for commercial grade glass owing to its SiO2 content (80.7–94.1 wt%). In particular, the Tista Barrage site shows high SiO2 (94.1 wt%) with reasonably low Al2O3, TiO2, and<br />MgO+CaO percentages, which suggest an excellent glass grade quality.<br />Unfortunately, some impurities (e.g., Fe2O3, Zr) are comparatively higher than<br />standards, which poses difficulties making high grade glass. However, if it is<br />possible to remove and/or decrease the major impurities, it may be used to<br />manufacture high grade glass (colourless glass). Ismail Hossain Syed Shamsuddin Ahmed Md. Najmul Islam Pradip Kumar Biswas Md. Aminur Rahman ##submission.copyrightStatement## 2015-01-15 2015-01-15 41 57 64 10.3329/rujleas.v41i0.21625 Effect of irrigation and sowing method on yield and yield attributes of mustard https://www.banglajol.info/index.php/RUJLEAS/article/view/21626 The experiment was carried out at Agronomy Field laboratory, Department of<br />Agronomy and Agricultural Extension, university of Rajshahi, to study the effect of irrigation and sowing method on yield and yield attributes of mustard. The experiment consists of two factors i) irrigation viz. no irrigation (I0), one irrigation (I1)and two irrigations (I2) ii) sowing method viz. line sowing method (M1) and broadcasting method (M2). A split- plot design was used for the experiment by assigning the irrigation on the main plots and sowing method to the sub plots with three replications. Irrigation had significant effect on all the yield and yield contributing characters. The highest plant height, number of branches plant-1, filled siliqua plant-1, sliqua length, number of seed siliqua-1, 1000-seed weight and stover yield were obtained from I2 (two irrigations) and consequently it produced the highest seed yield. Sowing method also had significant influence on almost all the yield and yield contributing characters. All the yield contributing characters except number of unfilled siliqua plant-1were found best at line sowing method (M1) and consequently it produced the highest seed yield. However it could be noted from the study that the combination of two irrigations with line sowing method is better to get higher yield of mustard. M. B. Hossain M. S. Alam M. A. Ripon ##submission.copyrightStatement## 2015-01-15 2015-01-15 41 65 70 10.3329/rujleas.v41i0.21626 In vitro propagation of muskmelon (Cucumis melo L.) from nodal segments, shoot tips and cotyledonary nodes https://www.banglajol.info/index.php/RUJLEAS/article/view/21627 A rapid and efficient protocol is outlined for in vitro propagation of muskmelon<br />(Cucumis melo L.) Shoot tips, nodal segments and cotyledonary nodes from in<br />vitro grown seedlings were used as explants. The explants were inoculated on MS medium fortified with different combinations and concentrations of growth<br />regulators viz., BAP, NAA, GA3 and IBA for multiple shoot regeneration.<br />Effective result was found on MS medium supplemented with 2.0 mg/l BAP, in<br />which 90% and 70% cultures induced multiple shoots from nodal segments and<br />shoot tip explants, respectively. Whereas, 70% cultures of cotyledonary nodes<br />were found to induced shoots on MS medium with 1.5 mg/l BAP + 0.1 mg/l GA3. In vitro regenerated shoots were subcultured on half strength MS medium<br />supplemented with different concentrations of IBA and NAA for successful root<br />induction and the effective result (up to 70%) was found in medium with 1 mg/l<br />IBA. Well rooted in vitro grown plantlets were acclimatized in sandy soil, where<br />as 70% plantlets survived S. Parvin M. Kausar M. Enamul Haque M. Khalekuzzaman B. Sikdar M. Asadul Islam ##submission.copyrightStatement## 2015-01-15 2015-01-15 41 71 77 10.3329/rujleas.v41i0.21627