The Agriculturists The official journal of the Krishi Foundation. Includes full text articles. The Krishi Foundation en-US The Agriculturists 1729-5211 Response of Some Landrace Rice (<i>Oryza sativa</i> L.) Cultivars to Applied Nitrogen in Lowland Ecosystem <p>An experiment was conducted to determine the effects of nitrogen (N) fertilization on growth and yield of some landrace rice (<em>Oryza</em> <em>sativa</em> L.)<strong> </strong>cultivars in lowland ecosystem. Three popular landrace rice cultivars: Rajashail, Kutiagni and Sadamota were treated with five times of N application viz. (i) two split applications of prilled urea (PU) at 10 days after transplanting (DAT) and before panicle initiation (PI) stage, (ii) deep placement of urea super granule (DPUSG) at 10 DAT, (iii) DPUSG before PI stage, (iv) PU application before PI stage and (v) control. The results showed that the landrace rice cultivar Kutiagni had the highest number of tillers under PU, while  Rajashail gave the highest number of tillers under DPUSG applied before PI stage. Further, Kutiagni produced higher amount of dry matter under two splits of PU, while Rajashail produced higher amount of dry matter under DPUSG applied before PI stage. However, application of PU before PI stage significantly increased leaf area index in all the three landraces. The varieties responded to applied N and produced the highest yield in Kutiagni. The DPUSG at 10 DAT increased straw yield but failed to increase grain yield even over control. The DPUSG before PI stage significantly increased rice yield and economic return. The yield of rice in DPUSG applied before PI stage was comparable to two splits of PU and top dressing of PU before PI stage. Compared to control (2.93 t ha<sup>-1</sup>), yield increase was 26% in Kutiagni (3.70 t ha<sup>-1</sup>) under DPUSG before PI stage. These results suggest that Kutiagni was more responsive to added N and this cultivar could be cultivated with DPUSG at PI stage.</p><p><em>The Agriculturists </em>2018; 16(1) 01-12</p> M A A Mamun M M Haque Q A Khaliq M A Karim A J M S Karim ##submission.copyrightStatement## 2018-07-21 2018-07-21 16 1 1 12 10.3329/agric.v16i1.37529 Effects of Cutting Length and Position on the Seed Yield and Quality of Tossa Jute (<i>Corchorus olitorius</i> L.) <p>An experiment was conducted at the research field of Jute Research Regional Station of Bangladesh Jute Research Institute (BJRI) at Kishoreganj during August 2009 to January 2010 to assess the effect of cutting length and position of cutting on seed yield and quality of tossa jute (<em>Corchorus olitorius</em> L.). Three cutting lengths (15 cm, 20 cm and 25cm) and three cutting positions (1<sup>st</sup> top, 2<sup>nd</sup> top and 3<sup>rd</sup> top) were the treatments. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The highest seed yield (917 kg ha<sup>-1</sup>) was obtained from 1<sup>st</sup> top x 15cm interaction and the lowest (811 kg ha<sup>-1</sup>) was recorded in 3<sup>rd</sup> top x 25cm cutting length. The highest seed germination (89%), field emergence (87%) and accelerated ageing (73%) were recorded from 1<sup>st</sup> top x 15cm interaction and the lowest seed germination (83.00%), field emergence (81%) and accelerated ageing (72) were recorded in 3<sup>rd</sup> top x 25 cm cutting length. The upper position of cutting produced the highest yield and best quality seeds.<em> </em></p><em>The Agriculturists </em>2018; 16(1) 13-20 M A F Mollah M Z Tareq Z A Rafiq S A Sarkar B Hossen ##submission.copyrightStatement## 2018-07-21 2018-07-21 16 1 13 20 10.3329/agric.v16i1.37530 Comparative Advantages of Lentil (<i>Lens culinaris</i>) and Mustard (<i>Brassica nigra</i> L.) Production and their Profitability in a Selected District of Bangladesh <p>The present study was conducted to estimate the profitability, domestic resource cost (DRC) and comparative advantages of lentil and mustard production in Bangladesh. Primary data were used in this study, where a total of 100 randomly selected farm survey (Mustard 50 &amp; Lentil 50) was conducted in Meherpur district using structured questionnaire. The study revealed that per hectare total cost and net profit of lentil production were about Tk. 78,442 and Tk. 86,590, respectively, whereas they were Tk. 62,527 and Tk. 38,718 for mustard production. The benefit cost ratios (BCR) of lentil and mustard production were 2.32 and 1.73, respectively, indicating that both lentil and mustard cultivation in Bangladesh are profitable. The domestic resource costs (DRC) of lentil and mustard production were 0.39 and 0.55, respectively which imply that Bangladesh has comparative advantage in producing both lentil and mustard. The Cobb-Douglas production function coefficients show that farm area, irrigation, pesticides, and chemical fertilizers (Gypsum, MP) were statistically significant factors affecting lentil production having increasing returns to scale. Farm area, irrigation and manure were statistically significant factors affecting mustard production with constant return to scale. In this study, production, technology and marketing problems have been listed down which will help the policy makers and the researchers to undertake proper steps for further improvement of lentil and mustard production in Bangladesh.<em> </em></p><em>The Agriculturists </em>2018; 16(1) 21-33 Sabrina Momtaj Tithi Basanta Kumar Barmon ##submission.copyrightStatement## 2018-07-21 2018-07-21 16 1 21 33 10.3329/agric.v16i1.37531 Effect of Seed Priming on Seed Germination and Seedling Growth of Modern Rice (<i>Oryza sativa</i> L.) Varieties <p>The experiment was carried out in the Seed Laboratory of Bangladesh Agricultural Development Corporation (BADC), Gazipur during June to July 2014 to investigate the effects of different priming methods on seed germination and the seedling growth of some rice (<em>Oryza sativa</em> L.)<strong> </strong> varieties. Four rice varieties: 1) Nerica, 2) BRRI dhan51, 3) BRRI dhan41 and 4) BRRI dhan49; and six priming treatments: 1) On-farm Priming, 2) Hardening, 3) Hydro-priming, 4) Osmo-hardening, 5) Vitamin C Priming and 6) Control were used in the experiment. The experiment was laid out in a completely randomized design (CRD). The treatments were replicated three times. The germination percentage and seedling growth parameters differed significantly among the priming treatments. For germination, Nerica variety showed poor performance, whereas the other varieties were found superior. Among the priming treatments, Vitamin C priming and Osmo-hardening were found superior. In case of interaction, germination was increased with Vitamin C priming and Osmo-hardening in Nerica. For seedling growth parameters, particularly vigor index, shoot and root lengths, BRRI dhan41 and BRRI dhan51 were found superior. The priming treatment Vitamin C and Osmo-hardening performed better than others.  Seedling vigor index was increased with Vitamin C priming and Osmo-hardening in Nerica variety. Shoot length at 15<sup>th</sup> day was influenced by hydro-priming in Nerica. Root length at 10<sup>th</sup> day was significantly increased with hardening in BRRI dhan41. Vitamin C priming and Osmo-hardening could therefore, be used for improving germination and seedling growth of Nerica.<em> </em></p><em>The Agriculturists </em>2018; 16(1) 34-43 A A Mamun U A Naher M Y Ali ##submission.copyrightStatement## 2018-07-21 2018-07-21 16 1 34 43 10.3329/agric.v16i1.37532 Evaluation of Rice (<i>Oryza sativa</i> L.) Genotypes for Drought Tolerance at Germination and Early Seedling Stage <p>Drought stress is a major constraint to the production and yield stability of crops. Rice (<em>Oryza sativa </em>L.) is considered as a drought-sensitive crop species. Within this species, there are considerable varietal differences in sensitivity to this environmental stress. An experiment was conducted at the laboratory of the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh during April to September 2016 to evaluate 100 rice genotypes for drought tolerance during germination and early seedling growth stage. The genotypes were tested against five levels of drought stress imposed by Polyethylene glycol 6000 (PEG-6000) @ 0, 5, 10, 15 and 20%. The experiment was laid out in a complete randomized design with four replications. The results showed that with increasing water stress, germination in all the genotypes decreased from 95.8% in control to 6.6 % in highest stress (20% PEG) level. Seedling height and dry weight also decreased in all rice genotypes with the increase in water stress level. Based on Standard Evaluation System (SES),18 genotypes were selected primarily. Among the 18 genotypes, Ratoil and Chinisakkar showed higher germination index, relative seedling height and relative seedling dry weight than the check drought tolerant BRRI dhan43 at 20% PEG. Beside these, performance of Kumridhan, Pusur and Somondori was also well at this level compared to BRRI dhan43. The genotypes Ratoil, Chinisakkar, Kumridhan, Pusur and Somondori showed the best performance under drought condition.<em> </em></p><em>The Agriculturists </em>2018; 16(1) 44-54 M M Islam E Kayesh E Zaman T A Urmi M M Haque ##submission.copyrightStatement## 2018-07-21 2018-07-21 16 1 44 54 10.3329/agric.v16i1.37533 In Vitro Shoot Regeneration of Rice (<i>Oryza sativa</i> L.) Varieties under Artificial Drought Stress <p>The shoot regeneration efficiency of two rice (<em>Oryza sativa </em>L.) varieties (Kasalath and BRRI dhan55) under artificial drought condition<em> </em>created by polyethylene glycol (PEG-6000) was investigated. Calli were induced in Murashige and Skoog (MS) medium supplemented with different concentrations (0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, and 4.0 mg/L) of 2, 4‐Dichlorophenoxyacetic acid (2, 4‐D). Then, <em>in vitro</em> shoot regeneration under PEG (6000) was conducted on MS medium supplemented with 1.0 mg/L NAA + 2.0 mg/L BAP + 1.0 mg/L kinetin that gave the highest number of shoots. Shoot regeneration in both varieties reduced with increased levels of PEG (0.5, 1.0, 2.0, 3.0 and 4.0%). Regeneration efficiency of BRRI dhan55 in drought stress was higher compared to Kasalath. Thus, <em>in vitro</em> screening of plantlets under PEG can be used to achieve fast and reliable selection for tolerance against drought. </p><em>The Agriculturists </em>2018; 16(1) 55-64 Anindita Chakraborty Soumitra Chowdhury Zahidul Haque Asim Kanti Dash A T M J Mosnaz ##submission.copyrightStatement## 2018-07-21 2018-07-21 16 1 55 64 10.3329/agric.v16i1.37534 Screening of Rice (<i>Oryza sativa</i> L.) Genotypes at Reproductive Stage for their Tolerance to Salinity <p>Soil salinity is one of the most devastating environmental stresses for rice production in the coastal areas of Bangladesh. Improvement in salt tolerance of rice is an important way for the economic utilization of coastal zones. An experiment was conducted at the vinyl house of the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh during December 2016 to April 2017 to determine the effects of different salinity levels on the yield and yield components of some rice (<em>Oryza sativa</em> L.) genotype sand finally, screening of rice genotypes for salt tolerance. The experiment containing four treatments was laid out in a complete randomized design with five replications. The treatments were four levels of saline water with electrical conductivities at control (0.3 dSm<sup>-1</sup>), 5, 10 and 15dSm<sup>-1</sup>. Based on screening at germination stage, relatively salt-tolerant eleven genotypes with two check varieties were used in this experiment. The study showed that increase in salinity level significantly decreased yield and yield contributing characters of rice. However, among the eleven, three genotypes (Chapali, Patnai 23 and Soloi) were considered as moderately salt tolerant at 15 dSm<sup>-1</sup> on the basis of their yields and yield contributing characteristics such as plant height reduction, total tiller reduction, effective tiller reduction, reduction of fertile grains per panicle, grain yield and relative grain yield. Therefore, Chapali, Patnai 23 and Soloi might be recommended as moderately salt tolerant rice genotypes.<em> </em></p><p><em>The Agriculturists </em>2018; 16(1) 65-77</p> M M Islam M H Faruqe M S Rana M Akter M A Karim ##submission.copyrightStatement## 2018-07-21 2018-07-21 16 1 65 77 10.3329/agric.v16i1.37535 Management of Foot and Root Rot Disease of Eggplant (<i>Solanum melongena</i> L.) Caused by <i>Sclerotium rolfsii</i> under In Vivo Condition <p>An experiment was conducted to evaluate the efficacy of fungicides, plant extracts, organic manure and biocontrol-agents against foot and root rot disease of eggplant caused by <em>Sclerotium rolfsii</em>. Five chemical fungicides, two plant extracts, organic amendment - poultry manure and biocontrol-agent <em>Trichoderma harzianum</em> were evaluated against the disease in field condition. Fungicides and plant extracts were sprayed at the base of each plant and adjacent soil at 40, 50 and 60 days after transplanting. Organic manure and biocontrol-agent were applied to the soil before transplanting. The lowest disease incidence (7.10 %) and no disease severity were observed in Bavistin 50 WP at 120 DAT followed by Topgan 50 WP and Ridomil Gold. Higher yield and plant growth like plant hight (88 cm), number of branch/plant (7.33) and number of leaf/branch (25.33) was also supported by Bavistin 50 WP . The highest benefit cost ratio was also calculated in Bavistin 50 WP followed by Topgan 50 WP and Ridomil Gold. Application of biocontrol-agent (<em>T. harzianum</em>) also showed promising effect against foot and root rot disease.</p><em>The Agriculturists </em>2018; 16(1) 78-86 Mohammad Nuray Alam Siddique Abu Noman Faruq Ahmmed Nusrat Jahan Md Golam Hasan Mazumder Md Rafiqul Islam ##submission.copyrightStatement## 2018-07-21 2018-07-21 16 1 78 86 10.3329/agric.v16i1.37536