Location specific field performance of aman rice cultivars in tidal flood prone ecosystem of Bangladesh

Received: September 3rd, 2022 ; Accepted: October 17th, 2022 ; Published: October 28th, 2022 ; Correspondence: [email protected], [email protected] of modern high yielding rice varieties are ecologically limited in a tidal flood (TF) prone area of Bangladesh. Therefore, rice growers are cultivating local rice cultivars that resist tidal water pressure and survive under waterlogged condition in a tidal ecosystem. A farmers’ participatory field experiment was conducted at Wazirpur, Bakergonj and Babugonj upazila of Barisal and Nalchity upazila under Jhalokati districts of Bangladesh to identify location specifies some aman rice cultivars that resist TF and give higher grain yield. There were fiftysixty local rice cultivars along with five modern rice varieties were included in this trial. The experimental sites were extensively TF prone and 10 to 80 cm of flood water entered into the crop field during active tillering to flowering stage of rice. Data on plant height, yield and yield components were recorded. The results revealed that local rice cultivars performed better than modern one in the experimental sites. Taller plant, production of more panicles per unit area, higher number of grains panicle-1 and heavier grains were the most important traits associated with plant adaptation of aman rice cultivars in tidal areas. Collectively, this study suggested that Dudmona1 and Khoiyamota1 at Wazirpur (2.98 to 3.10 t ha-1 ); Dishari1 and Sadamota2 at Bakergonj (2.92 to 2.98 t ha-1 ); Shorna at Babugonj (3.56 t ha-1 ); Moulata2, Achin and Sadamota2 at Nalchity (2.96 to 2.98 t ha-1 ) were most promising rice cultivar in terms of adaptation and grain yield

LINKING ISLAMIC COMMERCIAL AND SOCIAL FINANCE WITH SPECIAL REFERENCE TO CASH-WAQF AS NEW STRATEGY OF INTEREST-FREE MICRO-CREDIT FOR FAMILY EMPOWERMENT OF THE POOR TOWARDS ESTABLISHING WORLD SOCIAL BANK: A CASE STUDY APPROACH

The floating of Cash-waqf Certificate as a financial instrument by Social Islami Bank Ltd (SIBL) in Bangladesh in 1997 (formerly known as Social Investment Bank Ltd) is an innovation in the history of Islamic Finance. The issuance of Cash-waqf Certificate has settled the age-old controversy among scholars concerning the concept of perpetuity and inalienability associated with waqf property since its implementation during the Ottoman Empire in the early 15th century. This study has put forward three proposals to establish a World Social Bank that includes (i) Giving Institutional Leadership by Bank Indonesia (ii) Forming International Taskforce (iii) Connecting Initiatives of Muslim- Minorities in Non-Muslim Countries for initial establishment of Commonwealth of Human Communities. Since the aforementioned Cash Waqf is managed by the Bank, it has its transparency and accountability, it is a perpetual deposit and its profit can be invested in a wide spectrum of social investment. Bank shall manage Cash-Waqf on behalf of the Waqif. It can help monetizing Islamic Voluntary Sector, accumulation of Social Capital and National wealth, implementing strategic social investment program that reinforces family values, family heritage empower people at grass roots and stimulates economic, social and moral foundation of a caring society. Cash-Waqf Certificate provides new opportunities to transfer liquid asset and make connection with one another on a global scale leading to establishment of World Social Bank a new strategy of interest-free micro-credit for empowering the poor to irrespective of caste,creed and religion

Effects of periphyton grown on bamboo substrates on growth and production of Indian major carp, rohu (Label rohita Ham.)

The effects of periphyton, grown on bamboo substrates, on growth and production of Indian major carp, rohu, Labeo rohita (Hamilton), were studied in 10 ponds during July to October '95 at the Bangladesh Agricultural University, Mymensingh. Five ponds were provided with bamboo substrates (treatment I) and the rests without bamboo substrates (treatment II). It was revealed that there had been no discernible difference in the water quality parameters between treatments. A large number of plankton (30 genera) showed periphytic nature and colonized on the bamboo substrates. The growth and production of fish was significantly (p<0.05) higher in the ponds with bamboo substrates as compared to the ponds without substrates. The net production of rohu in treatment I was about 1.7 times higher than that of treatment II. Fish production was as much as 1899 kg/ha over a culture period of 4 months in the periphyton-based production system

Red seaweed liquid fertilizer increases growth, chlorophyll and yield of mungbean (Vigna radiata)

Received: October 29th, 2022 ; Accepted: February 12th, 2023 ; Published: April 3rd, 2023 ; Corresponding author: [email protected] demand for chemical fertilizers in Bangladesh is increasing by the day. Seaweed extracts are high in a variety of bioactive substances that can be used as a biostimulant as an alternative to agricultural plants. To assess the impact of foliar spraying of red seaweed (Gracilaria tenuistipitata var. liui) extracts at 5, 10, 15, 20 and 25% concentrationsin comparison to the control condition (water spray only) and soil application of recommended doses of fertilizer (RDF) as basal on growth, chlorophyll and yield of mungbean variety BU mug5, a pot experiment was conducted at the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh during Kharif-1 season (March to May 2021). Seven (7) treatments: T1 – Control (foliar spray using water), T2 – Recommended doses of fertilizers (RDF) as basal, T3 – Foliar spray of 5% seaweed extracts, T4 – Foliar spray of 10% seaweed extracts, T5 – Foliar spray of 15% seaweed extracts, T6 – Foliar spray of 20% seaweed extracts and T7 – Foliar spray of 25% seaweed extracts were imposed following completely randomized design (CRD) with three replications. The results revealed that seaweed liquid fertilizer at 20% concentration increased leaf area, total dry matter and chlorophyll (SPAD value) by 25.00, 40.21 and 9.11% over the control and 15.42, 8.27 and 2.08% compared to RDF, respectively. Seed yield increased by 93.14% when compared to a control with 20% seaweed foliar spray, and by 9.04%, when compared to RDF. Foliar application of 20% seaweed liquid fertilizer performed best among the treatments in terms of mungbean growth and yield, according to findings of the experiment. The results of this study suggest that red seaweed extracts from Gracilaria tenuistipitata var. liui may be used as a fertilizer to reduce the chemical fertilizer to boost mungbean yield

Dimensionless response of underground pipes due to blast loads using finite Element Method

Underground pipes are used for water supply, drainage, oil and gas supply, irrigation, etc. Blast constituent comprises of the ground media, intervening layer, structures, and blast. This study is aimed at determining the response of simulated empty underground pipes due to blast loads using finite element method. In this study, blast load parameters were determined using Unified Facilities Criteria (2008). Time integration technique in Abaqus/Explicit was used to solve the equation of motion. The soil and pipes materials were considered as elastic, homogeneous and isotropic. The material properties as obtained from different researchers and pipe manufacturers were used. Dimensional analysis was used to present the results. From the result of the dimensionless parameters, it was observed that depth of burial of pipes play a significant role in the response of underground pipes due to surface and underground blasts while coefficient of friction has little effect due to underground blast. Dimensionless pressure and deflection of underground pipes reduce as embedment ratios increase in surface and open trench blasts while this is not so in underground blast. Finally guidelines thus established would help in the design of underground pipes to resist effects of blasts. Consequently, the environmental risk and hazards caused by blasts will be reduced

Effects of Aggressive Ammonium Nitrate on Durability Properties of Concrete using Sandstone and Granite Aggregates

The storage of chemical fertilizers in concrete building often leads to durability problems due to chemical attack. The damage of concrete is mostly caused by certain ammonium salts. The main purpose of the research is to investigate the durability properties of concrete being exposed to ammonium nitrate solution. In this investigation, experiments are conducted on concrete type G50 and G60. The leaching process is achieved by the use of 20% concentration solution of ammonium nitrate. The durability properties investigated are water absorption, volume of permeable voids, and sorptivity. Compressive strength, pH value, and degradation depth are measured after a certain period of leaching. A decrease in compressive strength and an increase in porosity are found through the conducted experiments. Apart from that, the experimental data shows that pH value decreases with increased leaching time while the degradation depth of concrete increases with leaching time. By comparing concrete type G50 and G60, concrete type G60 is more resistant to ammonium nitrate attack

The cylindrical cell approximation in thermal utilization

In solving the neutron diffusion equation in one cell of an infinite lattice, a common procedure is to replace the rectangular (or hexagonal) cell with an equivalent cylindrical cell. In order to estimate the effect of this approximation a new method is presented in which the flux in the entire cell (not the equivalent cylindrical cell) is expanded in a Fourier cosine series. Then the boundary conditions over the cell surface are satisfied exactly. Furthermore, algebraic equations for the expansion coefficients of the flux are obtained because the integrals over the cell can be done in closed form. It is found that truncation of the flux series after 10 terms gives good results. The method is felt to have more general application than to the actual problem treated here since such `mixed geometry' problems frequently arise in reactor physics and in other areas as well.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/33375/1/0000773.pd

Evaluating the Efficiency of Household Stormwater Detention System

This paper describes the evaluation of water storing capacity of a household stormwater detention system based on field data. Collection of field data is often sidelined due to the cost and human capital incurred. However, the true value of field data is demonstrated here by comparing the observed and design data. A field test is completed in a real-life terrace house, utilizing the house’s 95m2 side canopy as roof catchment and 4.40m x 4.70m car porch area to station a detention tank. Precast concrete modular units with 3.9m3 effective storage volume are assembled within the tank. Downpipe with 0.1m diameter is installed to connect the roof gutter to the detention tank; while pipeline with 0.05m diameter is installed as the outlet from tank to the house perimeter drain. The mentioned setup is subjected to actual rainfalls from December 2019 till February 2020 that corresponded with the peak of Northeast Monsoon season. Ten observed storm events with peak hourly total rainfall readings ranging from 22 to 48mm are selected for analysis. Rainfall and water level readings from the field test allow the derivation of roof runoff volume and detained water volume in the tank. It is found that the household stormwater detention system is able to capture about 50% of the roof runoff. However, the current setup is found to cause flooding for rainfall over 40mm. The flooding issue, however, is undetected by the design data that underestimated the water storing capacity. This is due to the use of uncommon precast concrete modular units that may not have its flow characteristics represented by existing formula and model. No matter how uncommon the modular units be, various types and forms of stormwater detention system are becoming the new normal in the industry and field test is the best tool to validate their performances

A Wireless Based StormPAV Green Pavement Moisture Monitoring System

Concrete provides the foundation for the key systems in most construction projects mainly roads and buildings. For concrete, water is a key ingredient in the hydration process that sets and cures the cement portion of any concrete blend. However, if the excess water or moisture content is not given time to leave the slab, it will cause damage. This research focused on developing a moisture sensor monitoring system for StormP A V green pavement concrete which uses wireless data transfer to the processor. The monitoring system used Arduino as its operating system, dielectric constant concept to monitor the moisture content of the concrete, XBEE Pro as a tool for wireless data transfer, and Node RED software for data collection, monitoring, and analysis. Control experiment was carried out to determine the suitable method for measuring the moisture of the concrete. From the control experiment, it was convinced that the moisture content of the concrete could be determine by its dielectric constant. The performance of this developed system was validated by observing ten samples of freshly form concrete. It was found that the average days for the concrete to be completely dry which is on the 19th to 20th day. This proved that the time to wait before curing could be shortened to increase the productivity for concrete production rather than using the conventional estimation curing period which had been practiced formerly. Thus, the developed moisture sensor monitoring system which utilized low cost materials, low technological complexity, wireless data transfer and also sufficient sensitivity can be employed in concrete industry in wide-ranging