Archives of Agriculture and Environmental Science
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Weed competitiveness of winter rice (Oryza sativa L.) under modified aerobic system
Get PDFThe study was conducted during winter season (February-June) of 2016 at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh. Fourteen rice varieties namely, BRRI dhan28, BRRI dhan29, BRRI dhan47, BRRI dhan50, BRRI dhan55, BRRI dhan58, BRRI dhan59, BRRI dhan67, Binadhan-5, Binadhan-6, Binadhan-8, Binadhan-10, BRRI hybriddhan3 and Agrodhan14 were grown under weedy and weed- free conditions. Plots with no rice were also maintained to study the natural growth of weed in absence of rice. Primed rice seeds were dry seeded following 25 cm ×15 cm spacing with 5 seeds hill-1 on non-puddled soil. Plots were surface irrigated as and when necessary to maintain aerobic condition (at around field capacity) up to heading stage followed by wet condition from heading to grain filling stage. The results revealed that rice varieties varied widely in yield performance and weed suppressive ability. Among varieties, BRRI dhan59 allowed the minimum weed growth (20.8 g m-2) while Binadhan-5 allowed the maximum weed growth (65.8 g m-2). Grain yield ranged from 2.2 t ha-1 (BRRI dhan55) to 4.67 t ha-1 (Binadhan-5) under weed-free condition and from 0.62 t ha-1 (BRRI dhan55) to 2.48 t ha-1 (BRRI dhan59) under weedy condition. Weed infected relative yield loss ranged from 40.1% to 78.2% among varieties. BRRI dhan59 incurred the least yield penalty (40.1%) while Binadhan-5 performed the best in terms of grain yield (4.67 t ha-1) but its weed inflicted relative yield loss was higher (76.4%) than any other variety with low yield potential. BRRI dhan59, on the other hand, appeared as the most weed competitive variety (only 40.1% relative yield loss) with yield of 4.19 t ha-1. Present study confirms that the varieties tested under study varied widely in terms of weed suppressive ability and yield performance. Considering both yield and weed competitiveness, BRRI dhan59 can be recommended for cultivation following modified aerobic system
Growth and yield performance of okra genotypes in acidic soil at Sylhet Region, Bangladesh
Get PDFA field experiment was conducted at the field laboratory of Department of Crop Botany and Tea Production Technology, Sylhet Agricultural University from August 2016 to January 2017 to select the best suited okra genotype(s) considering growth and yield performance among eleven genotypes viz. BARI Dherosh−1 (control) and 10 exotic (Japanese okra) cultivable in acidic soil conditions. All okra genotypes were evaluated in relation to morphological characteristics and yield performance at defined area of study. The treatment combinations were laid out in a Randomized Complete Block Design (RCBD) with three replications. In almost all parameters, significant variations were observed. Experimental findings revealed that BARI Dherosh−1, JO−2, JO−6 and JO−10 showed excellent performance in germination capacity. The high yielding genotype BARI Dherosh−1 exhibited taller plant at final harvest. Early flowers, individual fruit weight with maximum number of flowers and fruits plant-1 was observed in JO−6. The genotype JO−3 produced the highest number of branches, internodes and leaves at final harvest. The flowering duration was long in the genotype JO−2. The highest fruit setting (%) was observed in JO−1. The longest fruit length and the lowest number of aborted fruits were observed in JO−5 whereas BARI Dherosh−1 showed the largest fruit diameter at 9 DAF and heaviest hundred seed weight. The highest fruit fresh weight observed in JO−4 and the highest fruit dry weight observed in JO−5 at 9 DAF. Regarding fruit yield, the genotype JO−6, JO−10 and JO−3 performed better. The genotypes JO−6 and JO−10 were found to be promising genotypes in acid soil considering the morphological features and yield attributes. Since the variety of our research is suitable for Sylhet region acid soil, if our variety is combined with Sylhet’s cropping pattern cropping intensity will be increase, which will benefit the farmer financially and meet the nutritional needs
Effect of rice residue on weed suppression and yield performance of boro rice
Get PDFThe experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from December 2017 through May 2018 to study the effect of rice residue on weed suppression and yield of boro rice. The experiment consisted of four different rice residue treatments such as no rice residue, 2.5, 5 and 7.5t ha-1rice residue, and five different herbicidal treatments such as no herbicide (H0), 25% of the recommended dose (RD), 50% RD, 75% RD and 100% of RD. The experiment was laid out in a randomized complete block design with three replications. Seven weed species belonging to five families infested the experimental plots. Weed density and weed dry weight were significantly affected by incorporation of rice residue and herbicidal treatment. The maximum weed growth was noticed with no rice residue incorporation and application of no herbicide. The minimum weed density and dry weight were found in incorporation of 5 t rice residue ha-1 and application of 100% of RD of herbicide treatment. Rice residue exerted significant effect on yield and yield contributing characters like plant height, number of total tillers hill-1, number of effective tillers hill-1 and grain yield. The highest grain yield (4.89 t ha-1) was recorded with the incorporation of 2.5 t ha-1 rice residue which was statistically identical with5 and 7.5 t ha-1 rice residues. The grain yield (5.70 t ha-1) produced by 75% of RD of herbicide was the highest among the other herbicidal treatments. The highest number of effective tillers hill-1 (12.80), 1000-grain weight (21.07), grain yield (5.87 t ha-1) and straw yield (7.21 t ha-1) were observed with the incorporation of 5 t rice residue ha-1 and 75% of the RD of herbicide treatment. Results of this study indicate that rice residue showed potentiality to inhibit the growth of weed and exerted significant effect on the yield of boro rice. Rice residue @ 5 t ha-1 with application of herbicide of 75% RD might be suggested to use for effective weed management and better grain yield of boro rice
Economic analysis of tilapia-carp polyculture in a selected area of Bangladesh
Get PDFAquaculture is moving on the way of intensification to fulfill the increasing demand of protein as capture fisheries are declining. The study was conducted to identify the socioeconomic characteristics, analyze the tilapia-carp polyculture system, profitability of tilapia-carp polyculture, and credit profile of the stratified randomly selected 50 sample farmers from Sherpur district in Bangladesh. Primary data were collected through field survey using an interview schedule. Some statistical measures like average percentage and ratios were calculated. The findings revealed that 36% of the respondents belonged to the age group of 25-29 years, 68% belong to medium family size (5 to 6 people), 44% respondents’ education level was higher secondary, 44% respondents’ primary occupation was fish farming and 46 % of were belonged to in annual income level of Tk. 150001-200000 (2360). Average fingerlings released in the tilapia-carp polyculture were 24240 per hectare per year. Most of the fingerlings collected from private hatcheries. The annual per hectare production of tilapia and carp were 8028 kg and 11085 kg., respectively. Per hectare per year gross cost, gross margin, gross return and net return were Tk. 1093008 (8961), Tk. 1735455 (7580), respectively. The BCR of tilapia-carp polyculture for cash cost was 1.78 and full cost was 1.59. About 20% of the respondents took loan from different sources and they received 84.51% of their applied amount and 84.73 % of the loan money used in productive purposes. Mortality of fingerlings, the high price of the ingredient, low price of fish, high interest rate and non-availability of good quality fingerlings at proper time were identified to be the major problems in conducting pond fish production. Government and other agencies should come forward to provide subsidized feed, technical supports and credit facilities for the tilapia-carp fish farmers to make the enterprise effectively
A review on history of organic farming in the current changing context in Nepal
Get PDFWorldwide, with the increase in awareness of health and environmental concerns, demand for organic agricultural products is increasing, however, its adoption in Nepal at the field level is minimal (0.30% of the total agricultural land area). Exploring the history of organic agriculture could answer, “why its growth, despite the increasing demand, is minimal?” The history of organic agriculture for commerce in Nepal is little known. This study thus explores the scope and history of commercial organic agriculture in Nepal. The paper identifies a few historical landmarks of organic agriculture; and while doing so, it describes the world history of organic agriculture. The study observed that a ‘pure’ form of organic agriculture in Nepal started in 1987, when an American research scholar established a commercial farm. Since then, it advanced until 1992, and then ‘merged’ with permaculture. The organic agriculture movement rejuvenated again in 2002 into the 10th five years plan. Much of the national policy documents on organic agriculture favored ‘income’ and perceived organic products as luxurious goods. As a result, much of the innovation in organic agriculture, government priorities, and people’s perception inclined towards earning dollars rather than environmental conservation and sustainability of the farming system. The movement of organic agriculture in Nepal deviated from its philosophical grounds and the government's priority increased on earnings, resulting in some myths in the Nepalese society on organic agriculture. All these factors caused minimal growth of organic agriculture, despite its great scope at national and international levels
Current status of Iraqi artisanal marine fisheries in northwest of the Arabian Gulf of Iraq
No full textThe study was conducted to analyze the fish landings from Iraqi artisanal marine fisheries, northwest Arabian Gulf from January 2017 to December 2019. The monthly data of fish landings were collected from the main landing site at Al-Fao port, south Iraq and were analyzed using descriptive statistics. A total of 35 taxa in 18 families were identified in the artisanal catches, in addition to two species of shrimps. The highest total landings were 11,944 t in 2018 and 11,305 t in 2019. The annual total landing of the marine fisheries increased by 270% during 2017-2019 as compared with the annual landing during 2008-2016. Threadfin bream contributed 14.1%, followed by river shad (11.1%) and mullets (11.1%), whereas shrimps formed 15.2% to the total catch. The overall values of biomass diversity of fish ranged from 1.82 in 2017 to 2.85 in 2018. There were 320 registered fishing boats motorized by 65 to 950 hp. Multi gears fishing were observed. The trends of the landings of all fish groups were increased substantially, except river shad, threadfin bream and shrimps. The study suggests some of the management measures must be put into place, especially for the river shad in the regions of their migration reproductive and the nursery
Assessment of fish pond sediments for growth, yield and nutritional quality of Indian spinach (Basella alba L.)
Get PDFIntegrated farming system is a very effective tool for improving rural economy. Our present study was carried out in different pond dykes of Dumuria upazila of Khulna district, Bangladesh to investigate the effect of different fish pond sediments on growth, yield and subsequently analyze the nutritional quality of Indian spinach. The experiment consisted of two factors viz., pond types (P) (three different ponds growing different fish species: P1 = prawn and carp, P2 = prawn and mola, and P3=prawn, mola and carp) and each pond was cultivated with different fish species with different population densities); and pond sediments (M) (three levels: M1 = pond dyke soil, M2 =50% pond mud and 50% pond dyke soil, and M3 =100% pond mud). Physical and chemical properties of three ponds dyke soil as well as sediments were analyzed. Parameters studied on Indian spinach were growth, yield and nutritional qualities. Pond sediments were better quality due to well decomposition and microbial activity of sediments compared to dyke soil of ponds. Organic matter of pond sediment was 2.79 (P3) and EC was 790 (µc/cm). Plant height was varied from 10 to 19% due to the ponds type and sediment effects. Mostly, the plant growth was found better under the supplement of 100% pond sediments compared to dyke soil (M1) and mixed soil (M2). The highest yield was found in P3M3 and it was varied from 20 to 25%. Minerals like Ca (%), P (%), and S (mg/100g) were found statistically significantly higher in P2M3 compared to other treatments combinations. Nutrition like Vit A and Vit C were the highest (81.33 µg/100 g and 106.14 mg/100 g, respectively) found significantly higher in P2M3. Therefore, the pond mud (50% and 100%) can be used to increase the yield and nutrient uptake by the crop which can facilitate to reduce eutrophication and fertilizer for the better environment.  
Impact of forest land cover on runoff, erosion and sedimentation in the Karai Watershed, Simalungun Regency, North Sumatra Province, Indonesia
Get PDFDevelopment activities in the Karai Watershed, in upstream area, are intensive. The activities tend to decrease the land abilities in absorbing water and protecting surface soil for erosion, which finally affect the rise of vegetation damage, soil damage, surface run-off and erosion The method of taking samples and analyzing environmental damage were conducted by purposive sampling. Data from laboratory tests of soil physical, chemical and biological properties were analyzed by statistical tests. Measurement result shows that the wide of Karai Watershed is 462 km2, in which covered forest wide is 115.5 km2 (25%) and the wide of non-forest area (garden, dwelling site, road etc) is 346.5 km2 (75%). Land Cover for non forest area is the biggest sediment source in Karai Watershed. Based on observation on field and laboratory analysis, it shows that conservation activities in natural forest to garden, road, and dwelling site have caused damages to soil (parameter bulk density and total fungi) and environment with indicators of erosion, sediment materials in Karai River and Karai 7 Project location. Observation result shows that program to reduce erosion and sedimentation could be implemented by integrated management program of Karai Watershed with priorities to develop mixed garden and agroforestry
Analysis of agricultural growth and its determinant factors in Nepal
Get PDFThis paper critically analyzes the trajectory of agricultural growth and its determinants in Nepal. Agricultural growth is vital for stimulating overall economic growth. The World Bank research shows strong statistical link between agricultural and overall economic growth in less developed countries. Economic growth and agricultural growth in Nepal also show strong correlation (r = 0.7501***). Agricultural transformation is characterized by declining share of agriculture in national employment and GDP, and increasing share of secondary sectors like industry, service and manufacturing. However, this structural shift seems unplanned and ungoverned in case of Nepal. The contribution of agriculture to GDP is continuously declining, but, the growth of secondary sectors likes industry and manufacturing still looks stagnant. At this incipient stage of agricultural transformation, productivity growth in agriculture is both a necessary as well as sufficient condition for the development of economy as a whole. Agricultural growth depends on institutional (agricultural credit and land holdings), infrastructural (irrigated area, farm mechanization, electricity, storage, transportation, agricultural market), technological (high yielding varieties or improved seed, fertilizers and pesticides) and socioeconomic factors (population, poverty and literacy). Policies strengthening these determinants can help Nepal in achieving targeted sustained economic growth
Foliar-applied Amcoton® and potassium thiosulfate enhances the growth and productivity of three faba beans varieties by improving photosynthetic efficiency
Get PDFAmcoton® [a mixture of 0.45% naphthalene acetic acid and 1.25% naphthalene acetamide] and potassium thiosulfate (KTS) play a crucial role in growth and productivity enhancement of faba beans plants. The current study aimed to evaluate the potential impact of Amcoton® and KTS foliar application on growth, yield, and photosynthetic efficiency in three faba beans varieties (i.e. Giza-843, Nubaria-3, and Sakha-4) during 2016-17 and 2017-18 seasons. Results exhibited that Amcoton® and/or KTS significantly increased growth indices (e.g., plant height, number of leaves and branches, leaves area, shoot dry weight), yield component, and chlorophylls contents and photosynthetic efficiency in comparison with untreated control plants. Giza-843 showed significantly higher growth and productivity when compared to Nubaria-3 and Sakha-4. Seed yield significantly positive correlated with leaves area, chlorophyll content, plant height, number of branches, pods and seeds per plant, pod dry weight and biological yield. Results obtained through this study highlighted the potential impact of Amcoton® and/or KTS on enhancing the growth and productivity of faba beans plants by improving leaf chlorophylls contents and photosynthetic efficiency