Current Journal of Applied Science and Technology https://journalcjast.com/index.php/CJAST <p style="text-align: justify;"><strong>Current Journal of Applied Science and Technology (ISSN:&nbsp;2457-1024)</strong> is dedicated to publish research papers, reviews, case studies and short communications from all disciplines of science and technology. By not excluding papers on the basis of subject area, CJAST facilitates the research and wishes to publish papers as long as they are technically correct and scientifically motivated.</p> SCIENCEDOMAIN international en-US Current Journal of Applied Science and Technology 2457-1024 Impacts of Agrochemicals on Water Quality Parameters in Aboisso Region (South-East of Cote d’Ivoire) https://journalcjast.com/index.php/CJAST/article/view/31167 <p>Aboisso region is experiencing unprecedented agricultural activities. Cultural techniques such as the use of insecticides are harming the quality of water. This study aims to assess the impact of insecticides on the water quality in the Aboisso region. Thirty-one (31) water points (10 surface water and 21 groundwater) were sampled. The determination of physicochemical parameters as well as the multi-residue method used for insecticides analysis in the samples allowed us to achieve our objective. The result of the physicochemical analysis shows that the temperature of groundwater (27.91°C) is higher than surface water temperature (26.77°C). These waters are mostly acidic with a slightly lower pH for groundwater (6.46) compared to surface water (6.54). The conductivity is higher in groundwater (average of 130.46 µS/cm) as opposed to surface water (average of 43.50 µS/cm). After applying the multi-residue method, the results reveal the presence of nine (9) active ingredients. In surface waters, all these molecules, except Lambda-cyhalothrin and Deltamethrin, exceed the WHO guide values (0.1 µg/L). The highest concentrations recorded concern ethyl parathion and profenofos (8.24 µg/L and 8.04 µg/L respectively). In groundwater, it is rather Parathion-methyl, Profenofos, Dimethoate, Chlorpyriphos-ethyl, Lambda-cyhalothrin and Deltamethrin that are often at below WHO standards. However, the present study reveals that all of the water samples analysed were polluted, owing to anthropogenic used of insecticides in the region, and other chemicals with high concentrations of parathion-ethyl: 8.24 µg/L and profenofos: 8.04 µg/L. These waters are therefore unfit for human consumption.</p> Assouman Amadou Kpan Oulai Jean- Gautier Gnamba Franck Maxime Oga Yéï Marie Solange Biémi Jean ##submission.copyrightStatement## 2020-12-31 2020-12-31 1 19 10.9734/cjast/2020/v39i4631167 Construction of Corrupt Behavior Practices of Village Officials through Web Portals in Indonesia 2019 https://journalcjast.com/index.php/CJAST/article/view/31168 <p>The role of online mass media in this period became very important in disseminating information to the public. Online media such as news.detik.com and jateng.tribunnews.com have become one of the media that has reported a lot about village funds. However, the two online masses have their styles in constructing village fund news in Central Java, especially concerning several corruption cases that involve village officials.</p> <p>This study aims to analyze the construction of village officials behavior through the framing of the web portal 1 and web portal 2 in the corruption case of village funds in Central Java, Indonesia.</p> <p>This research is a qualitative type with a descriptive approach. The data collection method used documentation study from the web portal 1 and web portal 2.</p> <p>The research partisipants were the news content of web portal 1 and web portal 2 for the period 2019. The analysis used was the framing analysis model of Zhong Dang Pan and Gerald M. Kosicki.</p> <p>The finding of this research is that the news from web portal 1 highlights the "how" and "why" aspects. Web portal 2 has more news about live news and is oriented in advance and actuality based on quick publication than web portal 1.</p> <p><strong>Conclusion: </strong>web portal 1 in explaining the corruption of village funds deeper than web portal 2. This news has influenced the behavior patterns of village officials in carrying out village government duties.</p> Agus Triyono ##submission.copyrightStatement## 2020-12-31 2020-12-31 20 31 10.9734/cjast/2020/v39i4631168 Creep Velocity of Non-Spherical Gravel Particles in Mountainous Regions https://journalcjast.com/index.php/CJAST/article/view/31169 <p>The movement of sediment particles is governed by the relative magnitude of acting drag and the resistance offered by the particle. The magnitude of drag force that acts on a sediment particle depends on flow parameters as well as on the surface area of the particle exposed to flow. Similarly, the resistance offered by the particle depends on its weight and the surface area of the particle in contact with the stream bed. In the case of spherical particles, orientation does not play an important role, while in the case of non-spherical particles how particle orients itself play a vital role. Therefore, in the case of non-spherical particles, which is the real situation, the movement velocity of sediment particles will depend on their orientation. Numerous studies have been conducted for spherical particles but literature is lacking information for non-spherical particles. In this study, experiments were conducted on coarse solitary non-spherical gravel particles to observe their creep velocity with their changed orientations under varying flow conditions. The experimental finding unveiled that the creep velocity of these particles not only depended on the shape and size of the particles but also on their orientation relative to the flow direction. It was observed that for a particle of a given size, the orientation of the particle which leads to maximum exposed area i.e O2 orientation resulted in the highest creep velocity. The findings of the study have been illustrated with mathematical relationships and graphical representations for various combinations of input variables.</p> Anuradha Kumari Akhilesh Kumar P. V. Singh ##submission.copyrightStatement## 2020-12-31 2020-12-31 32 40 10.9734/cjast/2020/v39i4631169 Heterosis and Combining Ability for Yield and Yield Attributing Traits in Tossa Jute (Corchorus olitorius L.) https://journalcjast.com/index.php/CJAST/article/view/31170 <p>Jute is one of the important bast fibre crop in the World next to cotton. Yield potential of this fibre crop is still under exploited and this natural fibre is facing challenges from synthetic products which calls for immediate attention to restore breeding works in a comprehensive manner. The present research has been contemplated with ten hybrids evolved from five lines of Tossa jute following half diallel matting design to ascertain gene action, combining ability and heterotic potential of the hybrids in respect of fibre yield and yield attributing traits. Methods comprised of growing of parents as well as F<sub>1</sub>s along with standard check in randomized complete block design (RCBD) maintaining three replications followed by recording observation on fibre yield and other yield attributing traits. Results revealed that most of the studied traits were governed by non-additive gene action which justified exploitation of heterosis utilizing these traits in this crop. The specific combining ability (SCA) components of variance (σ<sup>2</sup> SCA) were larger than the general combining ability (GCA) components of variance (σ<sup>2</sup> GCA) for all of the five traits under study which further implied the preponderance of non-additive components of variance towards the expression of these traits. JRO 524 was detected as the best general combiner considering the economically important trait. Finally, considering dry fibre and stick yield, three hybrids, namely OIN 24 × JRO 524, OIN 39 × OIN 46 and OIN 39 × JRO 524 has been identified to be superior over their better parent as well as standard check regarding these traits. Additionally, all these three hybrids exhibited positive and significant SCA effects. These three promising specific combiners can be advanced to get better Tossa jute lines for bolstering economic returns of the farming community in future.</p> Anita Roy Kumaresh Dasgupta Sourav Hazari Sudip Bhattacharya Arpita Das ##submission.copyrightStatement## 2020-12-31 2020-12-31 41 49 10.9734/cjast/2020/v39i4631170 Interactive Effects of Silicic Acid and NOVEL on Tomato Performance under Protected Conditions https://journalcjast.com/index.php/CJAST/article/view/31171 <p><strong>Aims: </strong>The present investigation was carried out in tomato under protected culture to find out the effect of silicic acid (0.0%, 0.1%, 0.2% and 0.3%) and Novel organic liquid nutrient (NOVEL) [0.0%, 1.0%, 1.5% and 2.0%] spray on tomato performance under protected conditions.</p> <p><strong>Study Design:</strong>&nbsp; The study was conducted in a factorial experiment based on randomized complete block design.</p> <p><strong>Place and Duration of Study:</strong> The experiment was conducted under naturally ventilated polyhouse at Regional Horticultural Research Station, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari (Gujarat), India between December 2017 and June, 2018.</p> <p><strong>Methodology:</strong> The experiment comprising of 16 treatments with 4 levels each of silicic acid (0.0%, 0.1%, 0.2% and 0.3%) and Novel organic liquid nutrient (NOVEL- a brand product of NAU, Navsari prepared from banana pseudo stem) [0.0 to 1.0 % and 1.5 to 2.0 %] was carried out in tomato cv. Arka Rakshak. The data on plant height (cm) and leaf area (cm<sup>2</sup>) was taken from 5 randomly tagged plants. Reproductive traits like days to 50% flowering, days to first picking, number of pickings, days to last picking were recorded in plant population accommodated in net plot area (1.5 × 4.5 m<sup>2</sup>). Fruit set (%) was worked out by counting number of flowers per truss and their successive fruiting in each tagged plant during cropping span of tomato. Number of fruits and fruit weight at each picking were recorded in each tagged plant. The marketable as well as unmarketable fruits harvested from each net plot were weighed separately at each picking to calculate yield per plant and per unit area. The observation on leaf miner was made at weekly interval by counting total number and damaged leaflets from five randomly tagged plants.</p> <p><strong>Results:</strong> The analysis of data revealed significance of individual effect majorly of silicic acid on most of the traits under study. The effect of NOVEL was limited to few characters while interaction effect was found to be non significant for all the traits except leaf miner incidence. The results on plant height, days to 50 % flowering, days to first picking, and average fruit weight were found to be non-significant. Silicon as silicic acid (0.3%) recorded higher leaf area at final harvest (593.35 cm<sup>2</sup>), fruit set percentage (59.86), number of fruits per plant (49.68), days to last picking (186.16 days) and correspondingly higher marketable yield per plant (3.76 kg), total yield per plant (3.99 kg), marketable yield per m<sup>2 </sup>(10.82 kg) and total yield per m<sup>2 </sup>(11.48 kg). Different levels of NOVEL were found to influence number of pickings significantly and 1.5% NOVEL showed maximum number of pickings (29.92) during the cropping span of tomato. Leaf miner incidence was governed by individual as well as interaction effect of silicic aid and NOVEL with minimum incidence if 2.79% in plants sprayed with combination of silicic acid and NOVEL (0.1% + 1.0%)</p> <p><strong>Conclusion:</strong> Silicon as 0.3% silicic acid was turned out to be the potential treatment to achieve maximum leaf area, fruit set, number of fruits per plant, yield and enhanced cropping span.&nbsp; Silicic acid and NOVEL (0.1% + 1.0%) interactively have ability to strengthen the plant defence mechanism to resist leaf miner infestation.</p> R. Patel Jesal Sanjeev Kumar A. K. Pandey N. B. Patel J. M. Mayani ##submission.copyrightStatement## 2020-12-31 2020-12-31 50 57 10.9734/cjast/2020/v39i4631171 Growth Efficiency of Greengram (Vigna radiata L. Wilczek) Under Elevated Carbondioxide Condition https://journalcjast.com/index.php/CJAST/article/view/31173 <p>The CO<sub>2 </sub>concentration in the atmosphere is rising and anticipated to be doubled by the end of the current century. Agricultural crop production is one of the key sectors that might be affected by rising atmospheric CO<sub>2</sub> through its effect on photosynthetic rates and thus productivity. It was reported that C<sub>3</sub> plants respond to elevated CO<sub>2</sub> by modification of morpho-physiological traits. The crop selected for the present study was Green gram (<em>Vigna radiate </em>L. Wilczek). Though it is an important crop, the availability of pulses has declined. So, a study of the plant responses to high atmospheric CO<sub>2</sub> is important since it regulates productivity and quality. Moreover information about genotypic variation of crops under elevated CO<sub>2</sub> is lacking in legumes. The general aim of the study is test whether Green gram can adapt to such a change and to explore mechanisms underlining the adaptive response.</p> <p>Six genotypes of green gram used in the study were SML1827, SML832, SML1831, PM1533, Pusa M-19-31, and Pant M-5. Three different levels of CO<sub>2</sub> concentration namely 390ppm, 600 ppm and 750ppm under open top chambers along with an ambient concentration were maintained to assess the response of growth, physiological and yield parameters. The purpose of Open Top Chamber was to study the response of plants in high CO<sub>2</sub> environment with precise control and regulation of desired CO<sub>2</sub>, temperature and humidity.</p> <p>The results obtained for this experiment showed that elevated CO<sub>2</sub> has a positive effect on crop growth and development. Results indicated that 600ppm CO<sub>2 </sub>enhanced some growth parameters <em>viz</em>. leaf area, number of branches per plant, number of effective root nodules and total biomass of plant which ultimately influenced the yield. Under 750 ppm CO<sub>2, </sub>An opposite trend was recorded where yield was significantly reduced. Genotypes like Pant M-5, Pusa M-19-31 could be considered as better genotypes when grown under elevated levels of CO<sub>2 </sub>as they have better N acquisition capability because of greater nodule formation in addition to biomass accumulation. Therefore, such genotypes may be utilized as future breeding materials for adaptation to the changed climatic condition.</p> Tarique Aziz Ranjan Das Sangita Das ##submission.copyrightStatement## 2020-12-31 2020-12-31 58 73 10.9734/cjast/2020/v39i4631173 Assessing Crop Growth Indices of Nadia Variety of Ginger (Zingiberofficinale Rosc.) under Legume Intercropping and Weed Management Practices https://journalcjast.com/index.php/CJAST/article/view/31174 <p>A study was initiated in Instruction-cum-Research Farm of Assam Agricultural University, Jorhat-13, Assam, India during 2014-15 and 2015-16. The objective of this experiment is to understand the impact of legume intercropping system in combination with different weed management practices on the growth indices of ginger crop. Nadia, a commercially grown variety of ginger in Assam was examined in the current study. A total of 16 treatment combinations were considered which comprised of 4 intercropping systems along with 4 weed management practices. Amongst the legume intercropping, Cowpea in between rows of Ginger; incorporated at 40 days after sowing (DAS) and Cowpea in alternate rows of Ginger; incorporated at 40 DAS recorded better results in terms of Leaf area index (LAI), Crop growth rate (CGR), Absolute growth rate (AGR) and yield of Nadia variety ginger. Whereas amongst the weed management practices, pre-emergence application of Metribuzin 500 g ai ha<sup>-1</sup> + hand weeding (HW) at 70, 100 and 140 days after planting (DAP) scored higher in growth indices and ginger yield, but neither the legume intercropping systems nor the weed management treatments had any significant impact on harvest index.</p> Aparna Baruah Jayanta Deka ##submission.copyrightStatement## 2020-12-31 2020-12-31 74 81 10.9734/cjast/2020/v39i4631174