Archives of Agriculture and Environmental Science
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Performance and supply chain analysis of Binalebu-1 in some selected areas of Bangladesh
The study was conducted to find out the performance and supply chain of Binalebu-1 in four major Binalebu-1growing areas of Bangladesh, namely Cumilla, Mymensingh, Rangpur and Dhaka districts. Simple random sampling technique was followed for this study. The average cost of lemon production was estimated at Tk. 206127 per hectare of which about 68% was variable cost and 32% was fixed cost. Human labour cost was the lion share (32%) of total cost and it followed by irrigation cost (6.63%), Insecticide (2.64%) sapling (2.60%), and in the study areas. The average yield of Binalebu-1 was recorded 28.32 t/ha in all study areas while it was highest in 3rd year (30.24 t/ha) followed by 2nd year (28.17 t/ha) and 1st year (26.58 t/ha). The average gross return, gross margin and net return of lemon were found to be Tk 744517.62/ha, Tk 454521.67/ha, and Tk 538390.75/ha, respectively. Average BCR was found to be 2.71 on the basis of total cost. Supply chain was classified into four types: Channel 1: Accounts for 40 % which was ranked as I; Channel II: Accounts for 20 % which was Ranked as II; Channel III: Accounts for 18 % which was Ranked as III, Channel IV: Accounts for 12 % which was ranked as IV; Channel V: Accounts for 10 % which was Ranked as V. It was revealed that the value addition of the Faria, Bepari, Paiker, Arathdar, Retailer were Tk.135, Tk.95, Tk.55, Tk.39 and, Tk155 per quintal, respectively
Effect of integrated management on purple blotch (Alternaria porri (Ellis) Cif.) progression and bulb yield of onion at Arba Minch in Southern Ethiopia
A field experiment was conducted at Arba Minch area, southern Ethiopia during the 2018 and 2019 cropping seasons to determine the integrated effects of varieties and fungicide spray frequencies on onion purple blotch (PB) epidemics, bulb yields, and economic returns. Fifteen treatment combinations consisting of three onion varieties and five fungicide spray frequencies were arranged in a factorial experiment in a randomized complete block design with three replications. Integrating varieties with fungicide spray frequencies significantly reduced onion PB epidemics and increased bulb yields and economic returns. Due to four times spray of ridomil gold (RG) at 14-day interval, PB severities as low as 35.7, 42.2, and 58.9% were recorded on Nasik-Red, Bombay-Red, and Adama-Red varieties, respectively. The lowest area under the disease progress curve of 625.3, 706.7, and 1131.1%-days was also recorded on Nasik-Red, Bombay-Red, and Adama-Red varieties, respectively, due to four sprays of RG at a 14-day interval. Three times spray of RG at 10-day interval gave the highest bulb yields of 33.4, 38.9, and 23.7 t ha-1 on Nasik-Red, Bombay-Red, and Adama-Red varieties, respectively. The results showed the existence of variability in onion genetic resistance that was complemented by fungicide spray frequencies against PB epidemics to increase bulb yields. The use of Bombay-Red variety along with three and four-time spray frequency of RG was found to be the most effective option in reducing PB epidemics and increasing onion bulb yields. However, the use of Bombay-Red variety along with three-time spray frequency of RG could be recommended, because of its highest economic returns, to farmers in the study areas and elsewhere with similar agro-ecologies to manage PB and sustain onion production and productivity in the country
Effect of seasonal variations on the physicochemical characteristics of spring water in Oji River LGA, Enugu State Nigeria
This study was conducted to determine the effect of seasonal variations on the physicochemical characteristics of spring water samples in Oji River Local Government Area of Enugu State, Nigeria. Water samples were collected in sterile plastic water containers at the point of discharge during the dry and wet seasons and analyzed physicochemically using the standard methods for the examination of water and wastewater. The results showed that the colour (7-14.2 TCU); pH (7.18-8.4); temperature (24.6-28.1 oC); electrical conductivity in wet season (128.5-285.6 µs/cm); total dissolved solids (114.7-401 mg/L); total suspended solids (101.8-423.6 mg/L); total hardness (58-255 mg/L); total acidity (3.55-19.5 mg/L); total alkalinity (9.2-47 mg/L); biological oxygen demand (1.70-3.28 mg/L); nitrate (0.73-2.23 mg/L); ammonium in wet season (0.18-0.34 mg/L); zinc (0.011-0.085 mg/L); mercury (0.001-0.005 mg/L); copper (0.002-1.008 mg/L) and iron (0.031-0.318 mg/L) of water were within the WHO standard for drinking water quality while the phosphate (0.14-1.08 mg/L), lead (0.013-0.098 mg/L) and ammonium in dry season (0.48-0.75 mg/L) levels were not found within the prescribed limit of WHO drinking water standards. Therefore, this investigation indicated that the spring water is unfit for drinking without adequate treatment. Liming, boiling and ozonation treatment techniques are recommended for the treatment of water
A review of the water quality indices of riverine ecosystem, Bangladesh
Rivers have been the most important freshwater resource, and our ancient civilizations have flourished along the banks of rivers. River water finds multiple uses like agriculture, industry, transportation, aquaculture, and public water supply. Natural waters are being contaminated as the quality of water is being affected by anthropogenic activities, in developing countries like Bangladesh. From the point of view, the physicochemical parameters (water temperature, pH, electrical conductivity, total dissolved solids, DO, BOD, alkalinity, total hardness, nitrate) of seventeen rivers in Bangladesh were reviewed from January 2021 to June 2021. The water quality parameters of some rivers were found to be far above the suitable limits, which is dangerous for human health, agriculture, and fisheries. It is therefore necessary to check the water quality at regular interval of time to conserve the natural ecosystem of the rivers of Bangladesh. Furthermore, this study would help to create and develop awareness among the people to help maintain the quality of the river waters
A review on comparative effect of chemicals and botanicals in management of brown spot diseases of rice (Oryza sativa L.)
Brown spot of rice is a fungal disease caused by either Bipolaris oryzae, Helminthosporium oryzae or Drechslera oryzae species, which is found to be a major problem eventually causing sustainable losses both in quality and quantity. The pathogen after infection shows the symptoms on the leaves, panicles, glumes, and grain causing first as small, circular, and dark brown to purple-brown spots and fully developed lesions are circular to oval with a light brown to gray center, surrounded by a reddish-brown margin and ultimately killing the leaf. We have collected our information from secondary sources. In this review article, we have discussed the effects of bio-agents and chemicals and their comparative efficacy. Fungicides like: propiconazole, Carbendazim, Mancozeb, Hexaconazole, Cabendazim, Bion, Amistar, Tilt etc. are discussed which showed diverse performance on the diseases brown spot of rice. Extracts from the plant parts like roots, stem, leaves etc. are comparatively analyzed and studied that effected on mycelial growth and spore germination of Bipolaris pathogen. The plant components with phenolic structures like carvacrol, eugenol, and thymol are found to be highly active against the pathogen. The extracts of plants like Azadirachta indica, Nerium oleander, Curcuma longa, S. indicum, Cymbopogon citratus etc. are found suitable against brown spot in rice. Chemical fungicides were found to have more inhibition rate against the pathogen, even up to 100%. Although being eco-friendly, plant extracts were recorded to be less effective in comparison to chemical fungicides for suppressing plant pathogen. This article promotes the use of plant extracts for human health and environmental benefits over the use of chemicals for the control of plant diseases
Influence of socio-economic attributes of farmers on the adoption of orchard management practices of mandarin in Myagdi district, Nepal
Mandarin is one of the major and highly commercialized fruit crops of Nepal. However, its productivity is widely varied throughout the country. The association of socio-economic characteristics of the farmers with the adoption of different orchard management practices and ultimately productivity is less known. Therefore, survey research was conducted in the Myagdi district to study the influence of socio-economic attributes on the adoption of different orchard management practices and their relation to the productivity of mandarin. A total sample size of 94 was selected by simple random sampling technique and interviewed with a pre-tested, semi-structured questionnaire. Data were entered and analyzed using MS Excel, Statistical Package for the Social Sciences (SPSS), and STATA, and the inferences were retrieved using the binary logistic regression model and multiple linear regression model. The study showed that the education level of the farmers has a positive influence on the adoption of mulching (p = 0.04) and pruning (p = 0.07). The secondary income source of the household has a positive impact on the adoption of chemical fertilizers (p = 0.08) and pruning (p = 0.03). Commercial mandarin farming in larger area has a positive influence on the adoption of Bordeaux mixture (p = 0.03) and insect management (p = 0.01). Extension services has great influence on the adoption of chemical fertilizers (p = 0.02), mulching (p = 0.03), Bordeaux mixture (p = 0.00) and insect management (p = 0.1). However, education level (p = 0.05), area under mandarin farm (p = 0.09), and extension services (p = 0.00) discourage the adoption of intercropping in the mandarin orchard. The productivity of mandarin orchards was significantly enhanced by FYM application, chemical fertilizers, irrigation, weeding, and Bordeaux application. This study shows that the farmers with better socio-economic conditions are more likely to adopt improved management practices in mandarin orchard which in turn enhance their productivity
Effect of unseasonal rainfall on rice production in Nepal during the year 2021: A case study
Our study explicit the information regarding the status losses and the compensation amount We browsed the website of Ministry of Agriculture and Livestock Development (MoALD) and visited Agriculture Knowledge Centre to obtain the information. Rice is a major cereal crop, contributing around 25% of GDP and majority of working population are engaged in rice production for at least half year. Increasing population and pernicious natural hazards had declined the rice production leading to increment in import of rice from neighboring countries. Nepal received 15% more rain than average monsoon in year 2021. Flooding in various areas of Nepal occurred, causing huge loss of rice production along with destruction of lives and property indirectly leading to food insecurity. The onset of heavy unseasonal monsoon, occurred at the period when rice crops were ready to harvest or ready to thresh, undermined the labor, time and money invested by the farmers. The total rice production has been reduced to 5.13 million tons in 2021 from 5.55 million tons in 2020 at the rate of 8.74%. Lumbini Province faced the highest loss, followed by Sudarpaschim Province of Nepal. Climate change was the major factor responsible for this, hampering the agricultural productivity. Government of Nepal had decided to provide compensation to them based on three categories: small farmers having holdings of up to 10 katthas received compensation of 65% of their cost of production , medium farmers having land holdings from 11 to 40 katthas received 30% of their cost of production ,the large farmers having land holdings more than 40 katthas received compensation 20% of their cost of production. Also, the partially affected farmers received compensation 20% of their cost of production
Growth and yield of short duration Aman rice (Oryza sativa) cultivars as influenced by age of seedlings
An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh during the period from July to December 2019 to study the effect of cultivar and seedling age on the performance of short duration transplant Aman rice. The experiment comprised four Aman rice cultivars, viz., BRRI dhan49, BRRI dhan56, BRRI dhan66 and BRRI dhan71, and four seedling ages viz. 20, 25, 30 and 35-day old seedlings. The experiment was laid out in a randomized complete block design with three replications. Results of the study showed that growth, yield and yield contributing characters were significantly influenced by cultivars, seedlings age and their interactions. At growth stage, BRRI dhan49 with 20-day old seedlings produced the tallest plant (57.67 cm and 67.33 cm, respectively), the highest number of total tillers hill-1 (15.00 and 13.67, respectively) and total dry matter (8.03 g m-2 and 11.50 g m-2, respectively) at 30 and 50 DAT. At harvest, the highest number of total and effective tillers hill-1 (12.82 and 12.00), longest panicle (24.50 cm), highest number of grains panicle-1 (128.80), heaviest 1000-grain weight (23.17 g), highest grain yield (5.35 t ha-1) and highest harvest index (51.69 %) were obtained from the cultivar BRRI dhan66. While, thirty-day old seedlings produced the highest number of total and effective tillers hill-1 (13.46 and 12.70), longest panicle (24.67 cm), highest number of grains panicle-1 (136.90), highest grain (5.62 t ha-1) and straw yields (5.81 t ha-1) and harvest index (51.67 %). In case of interactions, BRRI dhan66 with 30-day old seedlings produced the highest number of total and effective tillers hill-1 (14.67 and 13.97), longest panicle (26.00 cm), highest number of grains panicle-1 (146.7), highest grain yield (6.31 t ha-1) and highest harvest index (52.72 %). So, result of the present study reveals that BRRI dhan66 with 30-days old seedlings was found to be the best for obtaining maximum grain yield
Determining the rate of blended fertilizers and urea for potato production under rainfed condition in Jeldu, West Showa, Ethiopia
This experiment was conducted to determine the rate of blended fertilizers and urea for potato production under rainfed condition in Jeldu, West Showa, Ethiopia. Different fertilizer treatments viz., 150 kg ha-1 NPSB+80 kg ha-1 urea, 250 kg ha-1 NPSB+80 kg ha-1 urea, 350 kg ha-1 NPSB+80 kg ha-1 urea, 150 kg ha-1 NPSB+140 kg ha-1 urea, 250 kg ha-1 NPSB+140 kg ha-1 urea, 350 kg ha-1 NPSB+140 kg ha-1 urea, 150 kg ha-1 NPSB +200 kg ha-1 urea, 250 kg ha-1 NPSB +200 kg ha-1 urea and 350 kg ha-1 N+200 kg ha-1 urea was used for the production of Belete and Gudenie potato varieties (cv. Jeldu Wereda) during 2018-2019 using RCBD factorial arrangement in three replication. This study revealed that there was a highly significant difference between the yield and yield components of potato due to the main effect of fertilizer rates. The interaction did not significantly affect any parameter of potato during the study. The highest total and marketable yields (22.95 t ha-1 and 20.06 t ha-1), respectively were harvested from 350 kg ha-1 NPSB+200 kg ha-1 urea though not significantly different from total and marketable yield of 250 kg ha-1 NPSB+200 kg ha-1 urea (22.08 and 19.14 t ha-1) and 350 kg ha-1 + 140 kg ha-1 urea (21.65 and 18.84 t ha-1), respectively. The partial budget analysis indicated that the highest benefit (64,916.00ETB) was fetched from 350 kg ha-1 NPSB+200 kg ha-1 urea followed by 250 kg ha-1 NPSB+200 kg ha-1 urea (63,004.00ETB) while the highest marginal rate of return (19,430.00%) was recorded from 250 kg ha-1 NPSB+200 kg ha-1 followed by 150 kg ha-1 NPSB+200 kg ha-1 urea (17,000.00%). From this, it can be concluded that the NPSB+ urea rates highly significantly affected the yield and yield component of potato. Thus, 250 kg ha-1 urea+200 kg ha-1 urea can be used for high yield and high economic return of potato in Jeldu district
Ripening quality of banana cv. Amritasagor through application of different ripening agents
Desirable ripened quality banana fruits are important for the consumer acceptability. Banana cv. Amritasagar was treated with different ripening agents like control (R1), RipestuffTM @ 42 mg/10 mL water (R2), RipestuffTM @ 84 mg/10 mL water (R3), Ethephone @ 200 ppm (R4) and Ethephone @ 400 ppm (R5); and storage durations were 24 h (H1), 48 h (H2), 72 h (H3), and 96 h (H4). The two factors experiment was conducted with complete randomized design with three replications. Fruits were placed in container (RFL). With the progress of storage duration quality parameters like weight loss (%), peel color, pulp to peel ratio, softness, total soluble solids (TSS), and pH were recorded. Fruits treated with R3 and R5 produced uniform yellow color and the highest softness at 96 h. Whereas banana fruits treated with R2 developed peel colour and softness a bit slower compared to other treatments; and untreated fruits (control) were hard, poor in color and quality, and were not suitable for consumption at 96 h. The highest TSS (%) were found at 72 h treated with R5 and at 96 h with R5 including R3, and R4 showed the mostly similar TSS (%). Thus, RipestuffTM @ 84 mg/10 mL water (R3) and ethephon @ 400 ppm (R5) can be used maintaining quality and ripening banana for better price of banana growers and traders through avail it at earlier marketing and reduced postharvest loss