植物研究のためのディスポーザブルマイクロセンサの開発

筑波大学 (University of Tsukuba)201

Memoryscapes of the homeland by two generations of British Bangladeshis

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植物研究のためのディスポーザブルマイクロセンサの開発

筑波大学University of Tsukuba博士（工学）Doctor of Philosophy in Engineering2017この博士論文は、全文公表に適さないやむを得ない事由があり要約のみを公表していましたが、解消したため、令和3(2021)年9月22日に全文を公表しました。doctoral thesi

Yield determinants of a promising mungbean line under various planting densities

A field experiment was conducted during September to November, 1992 at the Regional Agricultural Reseach Station (RARS), Ishurdi, Bangladesh, to evaluate the growth performance of a mungbean line (cv. Mosk-I) under varying plant population densities. The treatments consisted of 20 x 10', 30 x 10', 40 x 10', 50 x 10', 60 x 10' and 70 x 10' plants ha-1. The lowest plant population density recorded the highest total dry matter (TDM) plant-1, crop growth rare (CGR), and pods plantl, while higher plant population (i.e. 50 or 60 plants m-2) produced the highest grain yield (> 1.30 t ha-1) and higher TDM per unit area. TDM, leaJ and pod dry matUir were positively correlated with grain yield. In contrast, stem and petiole dry matter showed negative correlation with grain yield

Effects of micronutrient and spacing on growth and chlorophyll content of rice

An experiment was carried out at the research field of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU).There were four nutrient treatments i.e., E1= NPKS recommended dose; E2= NPKS + Zn 5 Kg ha-1; E3= NPKS + Zn (5 Kg ha-1) + B (3 Kg ha-1) E4= NPKS + Zn (5 Kg ha-1) + B (3 Kg ha-1) + Mo (2 Kg ha-1) and three spacing S1= 20 x 10 cm2; S2 = 20 x 15 cm2 and S3 = 20 x 20 cm2.Micronutrient and spacing combined had a distinct positive response in crop growth attributes and chlorophyll content of rice. The tallest plant height (147.0 cm) and root length (13.50 cm) highest panicle length (22.56 cm) was attained in the treatment E2S3 but the maximum tillers per hill (14.95) and effective panicle per hill (14.17) were recorded in treatment E2S2. Physiological parameter i.e., LAI, CGR, RGR, NAR, total chlorophyll content of rice also responded significantly and the appropriate combination was E4S2treatment. Based on vegetative growth, physiological parameters and yield attributes the treatment combination E4S2 showed the best performance

Yields gap evaluation of wheat grown in Piedmont plain and Floodplain soils of Bangladesh through compositional nutrient diagnosis (CND) norm

Mineralnutrient stress is one of the major yield gap factors, especially in floodplain and piedmont plain soil. The compositional nutrient diagnosis (CND) provides a plant nutrient imbalance index in statistical distribution patterns, which is important for adjusting the soil-plant systems specific fertilization for maintaining sustainable soil fertility. This study calculated the CND norms of wheat (Triticum aestivum L.) and identified optimum wheat yield target of high-yielding subpopulation in farmers' fields. It also categorized the most yield limiting nutrient(s) for wheat grown. Popular high-yielding wheat was grown in 62 farmers' fields, maintaining farmers' nutrient management plan (FP) and improved nutrient management plan (INM). Nutrient composition analysis was done from 62 young foliar composite samples, collected at 7th leaves stage (vegetative stage).The CND generic model gave 3.47 Mg ha–1 as minimum cutoff yield of the high-yield subpopulation. Nitrogen was identified as the core yield limiting nutrient for wheat in piedmont and floodplain soils. However, the yield limiting nutrients for wheat grown in the studied are were established the following series: N > S > K, Mg >P, Ca and Mn >Fe >B >Zn respectively. The CND generic model, allowed us to suggest thatN, P, K, Mn, B were the factors discriminating high- from low–yielding subpopulation in piedmont plain and floodplain soils of Bangladesh

Chemical control of ufra disease of rice: a simple profitability analysis

Multiple field trials were conducted to determine the efficacy of Furataf 5G, Arodhan 5G and Biestern 5G @ 1.0 kg a.i/ha with standard check, Furadan 5G in two ecosystems and three seasons viz. November to April irrigated ecosystem (Boro), April to July (Transplanted Aus) and July to October (Transplanted Aman) rain-fed lowland ecosystems during 1995 to 1997. All the test chemicals are effective to control the ufra disease of rice and increased yield in comparison with Furadan 5G. In respect of all seasons, Furataf 5G, Arodhan 5G, Biestern 5G increased yield recovery 2.29- 4.15, 2.59-3.40 and 3.06-3.86 t/ha in three rice genotypes respectively, which was more or loss similar to Furadan 5G (3.09-3.65 t/ha). Yield reduces due to ufra disease was 79.48% in T. Aman, while it was 93.88% and 89.11% in T. Aus and Boro rice. Application of Furataf 5G, Arodhan 5G, Biestern 5G and Furadan 5G showed 14.44-15.74, 10.09-14.31 and 12.45 -14.92 times profitable in case of T. Aus, T. Aman and Boro respectively over the control (Diseased). Simple economic analysis also revealed that ufra control with the use of three chemicals in soil treatments is profitable. Thus three chemicals may also be used as alternative to Furadan 5G

Sustainable regeneration : everyday landscapes of food acquisition, Pendleton

The report is structured as follows. Chapter two provides the context to the research, outlining why a study of food acquisition and digital inclusion is necessary in Pendleton at this time, and why both issues are linked to the current regeneration programme. Chapter three sets out the methodology employed along with details of the recruitment of participants. Chapter four provides a detailed analysis of the findings from the digital skills side of the research including: digital usage, confidence and competence, and digital skills and shopping, and chapter five focuses on findings related to the food landscape. Chapter six summarises the key findings by identifying what is going well, making recommendations for changes at a variety of scale, as well as specific recommendations for the on-going regeneration programme, and recommendations for further research