Bangladesh Agronomy Journal <p>Published by Bangladesh Society of Agronomy. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="" target="_new">Creative Commons Attribution License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</p> <p>Bangladesh Agronomy Journal is included in the Directory of Open Access Journals (<a title="DOAJ" href="" target="_blank" rel="noopener">DOAJ</a>)</p> Bangladesh Society of Agronomy en-US Bangladesh Agronomy Journal 1013-1922 <p>Authors who publish with this journal agree to the following terms:</p><ol start="1"><li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="" target="_new">Creative Commons Attribution License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li><li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li><li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See <a href="" target="_new">The Effect of Open Access</a>).</li></ol> Production Potential and Weed Dynamics in Maize + Legumes Intercropping System <p>The experiment was carried out at the Bangladesh Agricultural Research Institute, Gazipur during summer season of 2012 to identify suitable legume crops for growing with maize in a maize + legume intercropping system for better weed suppression, system productivity and economic benefits in kharif season. There were 17 treatments, viz.T<sub>1</sub>= Sole maize (no weeding), T<sub>2</sub>= Maize + Mungbean (no weeding), T<sub>3</sub>= Maize + Mungbean (weeding at 20 DAE), T<sub>4</sub>= Maize + Mungbean (weeding at 40 DAE), T<sub>5</sub>= Maize + Mungbean (weeding at 20 and 40 DAE), T<sub>6</sub>= Maize + Soybean (no weeding), T<sub>7</sub>= Maize + Soybean (weeding at 20 DAE), T<sub>8</sub>= Maize + Soybean (weeding at 40 DAE), T<sub>9</sub>= Maize + Soybean (weeding at 20 and 40 DAE), T<sub>10</sub>= Maize + Blackgram (no weeding), T<sub>11</sub>= Maize + Blackgram (weeding at 20 DAE), T<sub>12</sub>= Maize + Blackgram (weeding at 40 DAE), T<sub>13</sub>= Maize + Blackgram (weeding at 20 and 40 DAE) T<sub>14 </sub>=Sole maize (weed free), T<sub>15= </sub>Sole Mungbean (weed free), T<sub>16</sub>= Sole Soybean (weed free) and&nbsp; T<sub>17</sub>= Sole Blackgram (weed free) were studied. Intercropping systems significantly reduced the weed population and weed dry biomass in comparison to sole cropping of maize under unweeded situation. Among the three different intercropping systems, maize + mungbean with two hand weedings produced the lowest weed dry weight (184.30 g at 20 DAE and 14.07 g at 40 DAE)&nbsp; and the highest weed control efficiency (87% at 40 DAE) followed by maize + soybean and maize + blackgram intercropping systems. The highest grain yield was obtained from weed free sole maize (8.05 t ha<sup>-1</sup>) than unweeded sole maize (6.48 t ha<sup>-1</sup>) treatment. Among all intercropping, maize + mungbean along with two hand weedings gave the highest yield (maize: 7.18 t ha<sup>-1</sup>; 572.6 kg ha<sup>-1 </sup>mungbean), resource complementarity and profitability (MEY = 10.62 t ha<sup>-1</sup>, LER = 1.81 and BCR = 2.47). From the study it was concluded that maize + mungbean with two hand weedings at 20 and 40 DAE would be the best in reducing weed growth, producing maximum yield and getting net return in intercropping systems during kharif season.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): 1-12</em></p> Q Naher SMR Karim M Begum MA Hossain ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 1 12 10.3329/baj.v23i2.52447 Sowing Time and Management Effects on Phenology, Growth and Yield of Garden Pea <p>The experiment was conducted at the research field of the Agronomy Division, Bangladesh Agricultural Research Institute (BARI), Gazipur and Regional Agricultural Research Stations (RARS), Burirhat during two successive rabi seasons&nbsp; of 2015 and 17 to find out the relation between different development events of garden pea&nbsp; (Pisum sativum L.) and the sowing time based temperature, and&nbsp; also to minimize the yield reduction by adopting appropriate management practices.&nbsp; The treatments comprised with three sowing dates (30 November, 15 December and 30 December) and three management practices (low, medium and high). Under high management, Nov. 30 sowing took maximum days (64 days in 2015-16 and 58 days in 2016-17 at&nbsp; Joydebpur and 58 days in 2015-16 and 57 days in 2016-17 at RARS, Burirhat) to reach harvesting maturity. The results indicated that the number of days required for attaining different phenological stages decreased with delay of sowing. Late sowing took minimum time from flowering to fresh pod maturity (51 days and 49 days in two years at Joydebpur, and 49 days and 46 days in two years at Burirhat) due to increase in minimum temperature. The results revealed that the highest pod yield (14.77 t ha<sup>-1</sup>in 2015-16 and 13.09 t ha<sup>-1</sup>in 2016-17 at Joydebpur and 9.63 tha<sup>-1</sup> in 2015-16 and 10.33 t ha<sup>-1</sup>in 2016-17 at Burirhat) was recorded from 30 November sowing with high management practices which was followed by 15 December with&nbsp; the same management. Yield reduction in late sowing was reduced to some extent by high management practices. The two year results revealed that 30 November sowing with high management practices (extra 20% recommended&nbsp; fertilizer dose, HRC + two irrigation at pre flowering and pod development stage + seed treatment +&nbsp; one weeding at 21 DAE) showed better pod yield than other combinations.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>13-22</em></p> SS Kakon MM Sheikh MSA Khan AA Begum JA Chowdhury MA Hossain ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 13 22 10.3329/baj.v23i2.52448 Planting Time Effect on Quality Seed Production of Three Varieties of Carrot (Daucus Carota L.) <p>Crop management like planting time is a crucial factor for maximizing yield especially for seed production. Seed production of carrot is greatly influenced by temperature as it requires adequate periods of cool temperature (vernalization) for flowering and seed production. To find out optimum planting time of carrot steckling for quality seed production the experiment was conducted at the Field Laboratory of Horticulture Farm, Bangladesh Agricultural University, Mymensingh during the period from October 2015 to May 2016.Three planting time viz. 05 January, 15 January and 25 January on the seed production of three carrot varieties viz. BA (Brasillia Agroflora), PA (Prima Agroflora) and NK (New Kuroda) which constituted 9 treatment combinations were included in the experiment. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Planting time had significant effect on most of the parameters studied. The January 05 planting of steckling gave the highest seed yield (527.92 kg ha<sup>-1</sup>) and the lowest was in January 25 planting of steckling (314.75 kg ha<sup>-1</sup>). Among the varieties BA gave the highest seed yield (448.73 kg ha<sup>-1</sup>) and the lowest yield for New Kuroda (395.35 kgha<sup>-1</sup>.) Considering interaction of planting time and variety the highest seed yield (572.37 kg ha<sup>-1</sup>) was obtained from the treatment combination of early planting (05 January) with the variety of BA and the lowest (279.77 kg ha<sup>-1</sup>) was recorded from the late planting (25 January) in variety PA. Hence, BA carrot variety planting on 5 January may be recommended for carrot seed production in Mymensingh region in Bangladesh.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>23-34</em></p> - Lutfunnahar MF Hossain MA Malek R Kamrunnahar J Hossain ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 23 34 10.3329/baj.v23i2.52449 Nitrogen Fertilization on Growth and Yield Response of Oat (Avena Sativa L.) <p>Nitrogen is one of the main inputs of oat cultivation and its efficient management is a basic for harvesting the maximum potentiality of the crop. An investigation was conducted at field laboratory of Agrotechnology Discipline, Khulna University, Bangladesh to find out the effect of nitrogen fertilizer on growth, yield and yield contributing characters of oat during 2017-2018. The experiment was designed in randomized complete block with seven N rates (0, 30, 45, 60, 75, 90 and 105 kg ha<sup>-1</sup>) in triplicate run. Application of N nitrogen significantly increased the growth and yield of oat. The results showed that 105 kg ha<sup>-1</sup> N was supreme in all growth parameters and straw yield but 90 kg ha<sup>-1</sup> N was better for main yield parameters and grain yield. The maximum plant height (101.27 cm), leaf number (11.90), tillers plant<sup>-1</sup> (9.93), plant density (41.33 m<sup>-2</sup>) and straw yield (4.70 tha<sup>-1</sup>) were recorded with&nbsp; 105 kg ha<sup>-1 </sup>N application, whereas the highest grain yield (1.76 t ha<sup>-1</sup>) was found with 90 kg ha<sup>-1 </sup>N. From the results of the present research, it may be concluded that application of 90 kg N ha<sup>-1</sup> could be used for oat production in soils of AEZ 13, Bangladesh.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>35-43</em></p> MM Islam AA Mamun SK Ghosh D Mondal ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 35 43 10.3329/baj.v23i2.52450 Integrated Nutrient Management on the Yield and Profitability of Cauliflower <p>Field experiments were conducted at Multi Location Testing (MLT) sites of Chandina and Debidwer of Cumilla district, and Kasba of Brahmanbaria district under on-farm research division (OFRD), Bangladesh Agricultural Research Institute, Cumilla during 2016-18 to find out the appropriate dose of fertilizer for the maximum productivity of hybrid cauliflower varieties. Five integrated nutrient management packages&nbsp; such as T<sub>1</sub>= Recommended fertilizer dose for high yield goal (HYG), viz. 40-20-38-7-0-0 NPKSZnB Kg ha<sup>-1</sup>, T<sub>2</sub>= T<sub>1</sub> + 1.5 t ha<sup>-1 </sup>vermicompost, T<sub>3</sub> = T<sub>1</sub> + 5 t ha<sup>-1 </sup>cowdung, T<sub>4</sub>= STB&nbsp; (107-61-107-30-3.0-1.0 NPKSZnB Kg ha<sup>-1</sup> and T<sub>5</sub>= Farmers practices&nbsp; (114-74-123.5-0-0 NPKSZnB Kg ha<sup>-1</sup>) were used in the trial. The experiment was laid out in a Randomized Complete Block (RCB) design with six dispersed replications. The result revealed that the highest curd breadth (21.68 cm), individual curd weight (1.86 Kg) and curd yield (44.14 t ha<sup>-1</sup>) was obtained from T<sub>2</sub> treatment followed by T<sub>3</sub> and T<sub>4</sub> treatments. The lowest yield was found from farmers practice. Similarly the highest gross return (Tk. 626669.00 ha<sup>-1</sup>) and gross margin (Tk. 493869.00 ha<sup>-1</sup>) were also found from T<sub>2</sub> treatment and the lowest (Tk. 457734.00 ha<sup>-1</sup> and 438066.00 ha<sup>-1</sup>) respectively from&nbsp; farmer's practice T<sub>5</sub>.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>45-49</em></p> SK Bhowal MH Hossain MM Bashir ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 45 49 10.3329/baj.v23i2.52451 Growth Assessment of Tropical Sugarbeet as Influenced by Spacing <p>The experiment was carried out at the research field of Agronomy and Farming Systems Division, Bangladesh Sugarcrop Research Institute (BSRI), Ishurdi, Pabna during 2012-2013 to determine the most suitable spacing for sugarbeet cultivation in Bangladesh. The experiment was conducted with nine spacing viz. 50 cm × 20 cm, 60 cm × 20 cm, 70 cm × 20 cm, 50 cm × 25 cm, 60 cm × 25 cm, 70 cm × 25 cm, 50 cm × 30 cm, 60 cm × 30 cm and 70 cm × 30 cm in a randomized complete block design with three replications. The effects of spacing on sugarbeet plantation were observed on growth and growth contributing components (germination percentage, number of leaves plant<sup>-1</sup>, root length, shoot length, root fresh weight, shoot fresh weight, root dry weight, shoot dry weight, crop growth rate) of sugarbeet. The highest germination percentage (95.67%), number of leaves plant<sup>-1</sup> (34.33) at 30 DAS, shoot length (54.07 cm) at 120 DAS, root fresh weight (969.47 g plant<sup>-1</sup>) at 150 DAS, shoot fresh weight (752.47 g plant<sup>-1</sup>) at 120 DAS and other growth contributing parameters were obtained with the spacing 70 cm × 30 cm. However, the maximum root length (38.97 cm) was obtained with 50 cm × 20 cm spacing. It was concluded that the wider spacing promoted the growth of individual beet, though the optimum spacing for maximum root growth of sugarbeet was 50 cm × 20 cm.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>51-58</em></p> MAT Sohel MAE Hossain HP Roy SM Reza FH Shanta MRR Razib ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 51 58 10.3329/baj.v23i2.52452 Planting System Effects on Intercropping of Gardenpea and Sorghum <p>The field experiment was conducted at Agronomy Research Field, Joydebpur and RARS, Burirhat, Rangpur, BARI during Rabi season of 2018-2019 and 2019-2020 to find out suitable combination of sorghum and gardenpea intercropping for higher productivity and monetary advantage. Treatments included in the experiment were: T<sub>1 </sub>= Sorghum normal row (SNR) + 1 row gardenpea (GP), T<sub>2 </sub>= SNR + 2 rows GP, T<sub>3 </sub>= Sorghum paired row (SPR) + 2 rows GP, T<sub>4 </sub>= SPR + 3 rows GP, T<sub>5 </sub>= SPR + 4 rows GP, T<sub>6 </sub>= Sole sorghum (60 cm ´ 10 cm) and T<sub>7 </sub>= Sole GP (30 cm ´ 10 cm). Light availability on gardenpea decreased with the increase of shade produced by sorghum canopy over the time up to 60 DAS. The lowest light availability on gardenpea was observed in T<sub>2</sub> treatment and the highest was observed in sole gardenpea (T<sub>7</sub>) followed by T<sub>3</sub> treatment in both the years. The maximum grain yield of sorghum was observed in T<sub>6 </sub>and it was decreased (6-10% in 2018-2019 and 1-12% in 2019-2020) at Joydebpur and (5-11% in 2018-2019 and 6-14% in 2019-2020) at Burirhat. The highest sorghum equivalent yield (SEY) of 10.93 t ha<sup>-1</sup> in 2018-2019 and 12.02 t ha<sup>-1</sup> in 2019-2020 at Joydebpur and 12.06 t ha<sup>-1</sup> in 2018-2019 and 11.77 t ha<sup>-1</sup> in 2019-2020 at Burirhat and also the highest land equivalent ratio (LER) of 1.77 in 2018-2019 and 1.93 in 2019-2020 at Joydebpur and 1.79 in 2018-2019 and 1.81 in 2019-2020 at Burirhatwere observed in T<sub>5 </sub>treatment. The highest gross margin of Tk.146600 ha<sup>-1</sup> in 2018-2019 and Tk.168400 ha<sup>-1</sup> in 2019-2020 at Joydebpur and Tk. 169200 ha<sup>-1</sup> in 2018-2019 and Tk.163400 ha<sup>-1</sup> in 2019-2020 at Burirhat and also the benefit cost ratio (BCR) of 3.04 in 2018-2019 and 3.34 in 2019-2020 at Joydebpur and 3.35 in 2018-2019 and 3.27 in 2019-2020 at Burirhat were also found in the same treatment. The results revealed that sorghum paired row + 4 rows gardenpea might be agronomically feasible and economically profitable for sorghum + gardenpea intercropping system at Joydebpur and Burirhat region.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>59-68</em></p> AA Begum MAK Mian SMAHM Kamal MR Karim RR Saha MA Hossain ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 59 68 10.3329/baj.v23i2.52453 Estimation of Temperature Co-Efficient of Wheat for Adjusting Proper Sowing Time <p>The field experiment was conducted at Agronomy research field, Joydebpur, Gazipur (Latitude: 23.999941, Longitude: 90.420273), RARS, Jamalpur (Latitude: 24.923025, Longitude: 89.950111) and ARS, Rajbari, Dinajpur (Latitude: 25.63544, Longitude: 88.65144) of BARI during rabi of 2018 – 2019 to observe the growth behavior and yield of wheat as influenced by prevailing air temperature based on sowing time. There were five sowing dates viz., D<sub>1</sub> = 10 November, D<sub>2</sub> =20 November, D<sub>3</sub> = 30 November, D<sub>4</sub>=10 December and D<sub>5</sub>=20 December. Sowing date showed great influence on TDM production, LAI, physiological maturity, yield and yield components of wheat. 30 November sowing produced the maximum TDM and LAI followed by 20 November sowing. These parameters finally contributed to higher grain yield than earlier and later sowing date. The crop sown on 30 November took the longest period (105, 106 and 109 days, respectively) to attain the physiological maturity with the highest GDD (1639, 1638 and 1640&nbsp; respectively) and 20 December sown crop took the shortest period (95 , 96&nbsp; and 98 days&nbsp; respectively) to attain the physiological maturity with the lowest GDD (1530, 1528 and 1525 at Joydebpur, Jamalpur and Rajbari, respectively).It was also found that 30 November sown crop produced the higher grain yield (4.90 t ha<sup>-1</sup>, 4.99 t ha<sup>-1</sup> and 5.03 t ha<sup>-1</sup> at Joydebpur, Jamalpur and Rajbari, respectively).The results revealed that 20-30 November sowing produced higher grain yield might be due to favourable air temperature for growth and development. Late sowing after November 30 produced lower grain yield due to high temperature prevailed at the later growth stage (March) of wheat at Joydebpur, Jamalpur and Rajbari region. The temperature co-efficient of wheat was estimated at 2.41 t ha<sup>-1</sup> (1.95-2.89 t ha<sup>-1</sup>) indicated grain yield reduced 2.41 t ha<sup>-1</sup> per 1°C increased of air temperature and effect of temperature on the grain yield of wheat was estimated at 81-84%.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>69-80</em></p> AA Begum MAK Mian J Rahman MM Khanum MZ Ali RR Saha ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 69 80 10.3329/baj.v23i2.52454 Influence of Organic Manures on Drought Stress at Different Growth Stages of Wheat <p>A pot experiment was conducted in the net house of the Agronomy department, Sher-e-Bangla Agricultural University, Dhaka during the period from November, 2018 to March, 2019 to evaluate the suitable organic source to mitigate the drought stress impact on wheat. The experiment comprised two factors viz. factor A: Three levels of organic manures, i)&nbsp; O<sub>0</sub> = Control (Without organic manure),&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ii) O<sub>1 = </sub>Cowdung (10 t/ha), iii) O<sub>2 = </sub>Poultry litter (5 t/ha), and factor B:&nbsp; four levels of drought i) D<sub>0</sub> =&nbsp; Control (without drought), ii) D<sub>1</sub> =&nbsp; Crown root initiation stage (at 20-29 DAS), iii) D<sub>2</sub> =&nbsp; Booting stage (at 45-54 DAS), iv) D<sub>3</sub> = Anthesis stage (at 55-64 DAS). The experiment was laid out in a completely randomized design (factorial) with three replications. Organic manure showed positive impact on yield and cowdung (O<sub>1</sub>) gave the highest grain yield (4.06 g plant<sup>-1</sup>). This may be attributed to the highest number of effective tillers plant<sup>-1</sup> (3.21), spike length (9.53 cm), spikelet spike<sup>-1 </sup>(17.31), grains spikelet<sup>-1 </sup>(2.31) and 1000-grain weight (44.61 g) of wheat in this treatment. In respect of drought imposition treatments, grain yield was found higher in control treatment (without imposition of drought) which was statistically similar with drought imposition at booting stage treatment (D<sub>2</sub>). These two treatments also showed highest number of effective tillers plant<sup>-1</sup>, spikelets spike<sup>-1</sup>, grains spike<sup>-1</sup> and 1000-grain weight. Regarding the interaction of organic manure and drought, cowdung without drought imposition (O<sub>1</sub>D<sub>0</sub>) and cowdung with drought imposition at booting stage (O<sub>1</sub>D<sub>2</sub>) were highest yielder among the other interactions which was attributed to higher 1000-seed weight, number of effective tillers plant<sup>-1</sup>, spikelets spike<sup>-1</sup> and grains spike<sup>-1</sup>. Results revealed that application of organic manure could reduce the impact of drought on wheat irrespective of growth stages. However, application of cowdung (10 t ha<sup>-1</sup>) was found more effective to combat drought impact at booting stage of wheat compared to other growth stages.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>81-86</em></p> AKMR Amin MA Baque ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 81 86 10.3329/baj.v23i2.52455 On-Farm Adaptation of Some Oilseed Crops Under Acidic Soil of Sylhet Region in Bangladesh <p>Screening of improve varieties for new areas is necessary to address the soil and environment for improving crop production systems. In this context, six separate field trials were conducted at farmer’s field in Sylhet areas for the two consecutive crop seasons during 2017-18 and 2018-19, respectively to evaluate the performance of improved varieties of crops with the existing cultivars. Each experiment was laid out in randomized complete block design with six dispersed replications. The unit plot size was varied with experiments. The result showed that improved varieties of oilseed&nbsp;&nbsp; crops mustard var. BARI Sarisha-16, soybean var. BARI Soybean-6, groundnut var. BARI Chinabadam-9, sesame var. BARI Til-4 and sunflower var. BARI Surjomukhi-2 performed better under the soil and climatic conditions of Sylhet region. This result reveled that these varieties of oilseed crops could be suitable for higher productivity and economic return.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>87-95</em></p> MI Nazrul M Akkas Ali ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 87 95 10.3329/baj.v23i2.52456 Yield and Physiological Indices of Lentil Genotypes Against Drought Stress <p>Four lentil genotypes/varieties BLX-010014-9, ILI-5143, BARI Mosur-3 and BARI Mosur-2 were given irrigation regimes (with and without irrigation) to evaluate the physiological indices of genotypes against drought stress. The experiment was conducted during rabi (winter) season of 2017-18 under pot culture at the Plant Physiology Division of Bangladesh Agricultural Research Institute (BARI). The experimental design was randomized completed block (RCBD) with six replications. Irrespective of genotypes/varieties, physiological parameters as well as seed yield were greatly affected due to irrigation regimes. Based on physiological parameters like accumulation of chlorophyll, enzymatic and non-enzymatic antioxidantthe genotype BLX-010014-9 was found to be drought tolerant due to its higher and lower values of enzymatic and non-enzymatic antioxidant indices (greater CAT, POD, APX and lower MDA) across the irrigation levels treatment. This genotype may be further explored to characterize its genes and mechanisms against drought stress for increased lentil production and way to developing the drought tolerant variety/varieties.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): </em><em>97-102</em></p> B Ahmed AS Mitu M Sultana N Tasnim AHMMR Talukder ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 97 102 10.3329/baj.v23i2.52457 Organic Amendment on Soil Quality and Yield Performance of Dry Direct Seeded Boro Rice <p>An experiment was conducted at Khitrokashipur, Durgapur, Rajshahi during March to June 2018 to study the effect of organic amendment on soil quality and yield performance of dry direct seeded boro rice var. BRRI dhan28. The treatments were Trichocompost (TC), Vermicompost (VC), mustard oil cake (MOC), Trichocompost + mustard oil cake (TC+MOC), Vermicompost + mustard oil cake (VC + MOC), and no amendment control. The experiment was laid out in a randomized complete block design with three replications. Trichocompost and Vermicompost were applied @ 3 t ha<sup>-1</sup>, while mustard oil cake was used @ 0.5 t ha<sup>-1</sup>. The results revealed that Trichocompost and vermicompost fertilization exerted significant influence on yield performance of BRRI dhan28 in boro season. The treatment trichocompost (T<sub>1</sub>) @ 5 t ha<sup>-1</sup> produced the highest grain yield (5.95 t ha<sup>-1</sup>), while the mustard oil cake (T<sub>3</sub>) @ 0.5 t ha<sup>-1</sup> the highest effective tillers hill<sup>-1</sup> (15.33), though&nbsp; the highest straw yield (5.46 t ha<sup>-1</sup>) was produced in the treatment VC + MOC (T<sub>5</sub>). In case of soil properties, Trichocompost (T<sub>1</sub>) @ 3 t ha<sup>-1 </sup>and mustard oil cake (T<sub>3</sub>) @ 0.5 t ha<sup>-1 </sup>improved soil organic matter content, while Trichocompost (T<sub>1</sub>) @ 3 t ha<sup>-1 </sup>and Vermicompost (T<sub>2</sub>) @ 0.5 t ha<sup>-1 </sup>improved phosphorus and potassium content. Field capacity was greatly influenced by Trichocompost (T<sub>1</sub>) @ 3 t ha<sup>-1 </sup>and Vermicompost + mustard oil cake (T<sub>5</sub>). Soils with Trichocompost (T<sub>1</sub>) @ 3 tha<sup>-1 </sup>showed the highest bulk density. It was concluded that organic amendment greatly improved the yield performance of BRRI dhan28 and also soil physical and chemical properties under dry direct seeded boro rice cultivation system.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): 1</em><em>03-109</em></p> MM Rahman M Uddin ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 103 109 10.3329/baj.v23i2.52459 Growth, Flower Dropping, Pod Set and Yield Response of Soybean Varieties as Affected by Suplemental Fertilizer Spray at Flowering <p>A field experiment was conducted during the period from January to May 2014 to study the response of growth, flower dropping, pod setting and yield of two soybean varieties to foliar fertilization of urea at early stage of flowering. Soybean varieties, BARI Soybean-5 and BARI Soybean-6, were feeded with four supplemental foliar spray treatments of fertilizer, viz.&nbsp; M<sub>1</sub>: Control i.e., no additional nutrient spray; M<sub>2</sub>: 20% of recommended urea spray at flowering; M<sub>3</sub>: 20% dose of the recommended MoP; and M<sub>4</sub>: 20% dose of the recommended DAP at early flowering stage. The experiment was laid out in a split-plot design with three replications. There was no significant effect of variety, fertilization spray or their interaction observed on growth parameters. However, flower and pod dropping was affected with higher flower dropping (55.2%) in BARI Soybean-5 and maximum pod dropping (16.44%) with DAP spray treatment. Higher yield attributes’ values such as seeds pod<sup>-1</sup> (2.42), seed yield (1.18 t ha<sup>-1</sup>), stover yield (1.02 t ha<sup>-1</sup>), and biological yield (2.21 t ha<sup>-1</sup>) were obtained with foliar DAP spray treatment. The interaction of BARI Soybean-5 and foliar DAP spray showed the highest seed yield (1.48 t ha<sup>-1</sup>), stover yield (1.26 t ha<sup>-1</sup>) and biological yield (2.75 t ha<sup>-1</sup>).</p> <p><em>Bangladesh Agron. J. 2020, 23(2): 1</em><em>11-117</em></p> N Chakma PK Biswas M Hasanuzzaman ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 111 117 10.3329/baj.v23i2.52460 Herbicide Use Strategy and Its Economy as a Weed Management Option in Wheat Varieties <p>Weed pressure is an additional threat to high temperature stressed wheat crop for its optimum production. A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during Rabi 2017-2018 to assess the response of wheat varieties to different weed managements and its economical viability. As such three varieties i.e. BARI Gom-28, BARI Gom-29, and BARI Gom-30 along with five weed managements viz. control (no weeding), two hand weeding at 20 and 40 DAS, Panida 33EC (Pendimethalin) @ 2000 ml ha<sup>-1</sup> spray at 5 DAS as pre-emergence, Affinity 50.75 WP (Isoproturon) @ 1500 g ha<sup>-1</sup> spray at 25 DAS as post-emergence and Panida 33EC (Pendimethalin) @ 2000 ml ha<sup>-1</sup> at 5 DAS + Affinity 50.75 WP (Isoproturon) @ 1500 g ha<sup>-1</sup> at 5 &amp; 25 DAS were treatment variables tested under split plot design.Cynodon dactylon, Cyperus rotundus, Echinochloa colona, Eleusine indica, Chenopodium album, Alternanthera philoxeroides, Brassica kaber, Leliotropium indicum, Vicia sativa,etc.werethe major weeds as determined based on their field intensity.Results revealed that BARI Gom-30 out-yielded other varieties with the highest grain yield (3.01 t ha<sup>-1</sup>). Pre-emergence application of Panida 33EC at 5 DAS proved as suitable weed management compared to other methods. BARI Gom-30 in combination with Panida 33EC @ 2000 ml ha<sup>-1</sup> spray at 5 DAS as pre-emergence gave higher yield and yield attributes while BARI Gom-28 under no weeding check showed lower grain yield (2.09 t ha<sup>-1</sup>). Economically maximum gross return (Tk.75761.52ha<sup>-1</sup>),net income (Tk.21775.92ha<sup>-1</sup>), and BCR (1.41) were associated with Panida 33EC treatment when minimum values were obtained in the control plot (no weeding). So, the application of pre-emergence herbicide, Panida 33EC might be economically viable weed management ensuring a higher yield in wheat cultivation.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): 1</em><em>19-125</em></p> MG Mostafa MF Karim HMMT Hossain ##submission.copyrightStatement## 2021-03-15 2021-03-15 23 2 119 125 10.3329/baj.v23i2.52463 Phosphorus and Boron Effects on Nodulation and Yield of Soybean Under Non-Saline Agro-Ecosystem of Patuakhali <p>The field experiment was conducted at Agronomy Field of Patuakhali Science and Technology University, Patuakhali during the period from December 2019 to May 2020 to evaluate the effect&nbsp; of phosphorus (P<sub>0 </sub>= 0 kg P ha<sup>-1</sup>, P<sub>1 </sub>= 30 kg P ha<sup>-1</sup>, P<sub>2 </sub>= 60 kg P ha<sup>-1</sup>, P<sub>3 </sub>= 90 kg P ha<sup>-1</sup>) and boron (B<sub>0 </sub>= 0 kg B ha<sup>-1</sup>, B<sub>1 </sub>= 4 kg B ha<sup>-1</sup>, B<sub>2 </sub>= 6 kg B ha<sup>-1</sup>) and their combinations on nodulation and yield attributes of soybean. Number of nodules plant<sup>-1</sup>, number of pods plant<sup>-1</sup>, number of seeds pod, 1000-seed weight, seed yield, stover yield, biological yield and harvest index increased significantly up to 60 kg P ha<sup>-1</sup>. On the other hand, number of nodules plant<sup>-1</sup>, number pods plants<sup>-1</sup>, number of seeds pod<sup>-1</sup>, 1000-seed weight, seed yield, stover yield, biological yield and harvest index of soybean were enhanced significantly up to 4 kg B ha<sup>-1</sup>. The combination of 60 kg P ha<sup>-1</sup> and 4 kg B ha<sup>-1 </sup>depicted the highest number of nodules (177.8), plant height (75.60 cm), number of pods plant<sup>-1</sup> (92.72), number of seeds pod<sup>-1</sup> (2.92), weight of 1000-seed (155.3 g) seed yield (1.91 t ha<sup>-1</sup>), stover yield (2.98 t ha<sup>-1</sup>), biological yield (4.89 t ha<sup>-1</sup>) and harvest index (39.06%). Thus, the combined application of 60 kg P ha<sup>-1</sup> and 4 kg B ha<sup>-1</sup> could be the optimum for getting maximum yield of soybean.</p> <p><em>Bangladesh Agron. J. 2020, 23(2): 127-133</em></p> S Shabnam S Ahmed S Mia ##submission.copyrightStatement## 2021-03-21 2021-03-21 23 2 127 133 10.3329/baj.v23i2.52465