International Journal of Natural Science Studies and Development (IJOSS)
Focus The International Journal of Natural Science Studies and Development (IJOSS) is an academic journal dedicated to disseminating the latest and most innovative research in the field of natural sciences. IJOSS provides a platform for researchers, academics, and practitioners to publish high-quality research findings related to various disciplines within the natural sciences. The journal is committed to supporting scientific and technological advancement through the publication of articles that significantly contribute to the understanding and application of natural sciences. The International Journal of Natural Science Studies and Development (IJOSS) focuses on publishing high-quality research articles, literature reviews, and case studies in the field of natural sciences. Scope: Biological Sciences: Research related to living organisms, ecology, genetics, microbiology, botany, zoology, evolutionary biology, living organisms, ecosystems, genetics, biotechnology, and environmental biology. Chemistry: Research on chemical reactions, chemical substances, synthesis, materials chemistry, and environmental. Physical Sciences: Studies in physics, earth sciences, meteorology, environmental science, fundamental principles of physics, applied physics, materials physics, and nuclear physics. Interdisciplinary Natural Sciences: Integration of natural sciences with other disciplines, including biochemistry, biophysics, environmental science, and materials science. Developmental Studies: Research on the application of natural science principles in technology, environmental sustainability, and socio-economic development. Environmental Studies: Articles addressing climate change, pollution control, conservation efforts, and sustainability practices. Agricultural Sciences: Research focusing on agronomy, soil science, plant pathology, entomology, crop management, crop production, agricultural biotechnology, sustainable farming practices, and pest management. Natural Resource Management: Studies on the sustainable use and management of natural resources like water, forests, and minerals. Civil Engineering: Research that explores the intersection of natural sciences and civil engineering, including structural engineering, environmental engineering, geotechnical engineering, and sustainable infrastructure development. Scientific Methodology: Innovative methods and approaches in conducting and applying natural science research. Geosciences: Research on geological processes, geography, geophysics, and environmental changes.
Articles
27 Documents
<![CDATA[The Effect of Liquid Organic Fertilizer from Fish Waste and Trichokompos on The Growth of Soybean Plants (Glycine max) of The Edamame Variety ]]>
<![CDATA[Aprilia, Nanda]]>;
<![CDATA[Rambe, Rahmi Dwi Handayani]]>;
<![CDATA[Gunawan, Indra]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 2 No. 2 (2025): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v2i2.26
<![CDATA[Soybeans (Glycine max) are the third most important food commodity after rice and corn and are one of the legumes used as a major source of protein and vegetable oil in the world. This study was conducted at the Experimental Farm of the Faculty of Agriculture, University of Islam Sumatra Utara, at an elevation of approximately 25 meters above sea level. This study aims to determine the effect of liquid organic fertilizer from fish waste and Trichokompos on the growth of Edamame soybean plants. This study employs a factorial randomized block design (RBD), with the first factor being Fish Waste Liquid Organic Fertilizer, consisting of four levels: L0 = No Fish Waste Liquid Organic Fertilizer (control), L1 = Fish Waste Liquid Organic Fertilizer 100 ml/polybag, L2 = 200 ml of liquid organic fertilizer from fish waste per polybag, L3 = 300 ml of liquid organic fertilizer from fish waste per polybag. The second factor was Trichokompos fertilizer, consisting of 4 levels: T0 = No Trichokompos fertilizer (control), T1 = Trichokompos fertilizer 12.5 tons/ha (62.5 g/polybag), T2 = Trichokompos fertilizer 25 tons/ha (125 g/polybag), T3 = Trichokompos fertilizer 37.5 tons/ha (187.5 g/polybag). The results of the study indicate that the application of Fish Waste Liquid Organic Fertilizer affects plant height, number of leaves, and stem diameter. Trichokompos affects plant height but does not affect the number of branches or stem diameter. The interaction between Fish Waste Liquid Organic Fertilizer and Trichokompos did not affect any of the observed parameters.]]>
<![CDATA[The Influence of Workplace Well-Being and Employee Engagement on Organizational Citizenship Behavior Through Work Motivation at the Indonesian Aviation Academy Banyuwangi ]]>
<![CDATA[Iswahyudi, Prasetyo]]>;
<![CDATA[Hari Kurniawanto]]>;
<![CDATA[Nur Halimah]]>;
<![CDATA[Khoirunnisa Larasati]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 2 No. 2 (2025): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v2i2.29
<![CDATA[This study examines the influence of workplace well-being and employee engagement on Organizational Citizenship Behavior (OCB) with work motivation as a mediating variable at the Indonesian Aviation Academy (API) Banyuwangi. The problem stems from a condition where employee extra-role work behavior is not optimal, so efforts are needed to understand psychological factors and engagement that can increase employee voluntary contributions to the institution. The results showed that workplace well-being and employee engagement have a positive and significant effect on work motivation. In addition, work motivation was proven to be able to mediate the influence of workplace well-being and employee engagement on increasing OCB, thereby strengthening the relationship between variables in supporting organizational performance. Overall, this study concludes that workplace well-being and employee engagement are important factors in driving motivation and extra-role work behavior. These findings have practical implications, necessitating HR policies that focus on creating a healthy, inclusive, and motivating work environment to strengthen a positive work culture. Furthermore, this study also provides theoretical contributions, enriching our understanding of the role of work motivation as a connecting mechanism in the context of aviation vocational education.]]>
<![CDATA[The Effect of Workload and Work Stress on Employee Performance Mediated by Job Satisfaction: An Empirical Study of Employees of the Indonesian Aviation Academy (API) Banyuwangi ]]>
<![CDATA[Iswahyudi, Prasetyo]]>;
<![CDATA[Nur Halimah]]>;
<![CDATA[Miko Andi Wardana]]>;
<![CDATA[Khoirunnisa Larasati]]>;
<![CDATA[Hendra Sudarso]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 2 No. 2 (2025): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v2i2.30
<![CDATA[This research is motivated by the problem of stagnant employee performance at the Indonesian Aviation Academy (API) Banyuwangi, influenced by an unbalanced workload and high levels of job stress. This condition has resulted in decreased productivity and performance accountability, which are mostly in the adequate category. Job satisfaction is suspected to be an important mediating variable in the relationship between workload, job stress, and employee performance, so empirical research is needed to find appropriate managerial solutions. The research method uses a quantitative approach with an explanatory research design. The independent variables in this study include workload (X1) and work stress (X2), while the mediating variable is job satisfaction (Y1) and the dependent variable is employee performance (Y2). Data were obtained through distributing questionnaires to employees of the Indonesian Aviation Academy (API) Banyuwangi using a purposive sampling technique, then analyzed to test the relationship between variables and the mediating role of job satisfaction. The research findings are expected to contribute both theoretically and practically. Theoretically, this study enriches human resource management studies related to the influence of workload and job stress on performance by considering the mediating role of job satisfaction. Practically, the findings of this study can serve as a reference for the management of the Indonesian Aviation Academy (API) Banyuwangi in formulating strategic policies, particularly in creating a balanced work environment, reducing stress levels, and increasing employee job satisfaction to encourage more optimal performance.]]>
<![CDATA[Relationship Between Nitrogen Phosphorus Potassium Content of Soil and Quality Sidimpuan Snake Fruit Based on Altitude ]]>
<![CDATA[Ali Sahbana, Takdir]]>;
<![CDATA[Yusriani Nasution]]>;
<![CDATA[Rasmita Adelina]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 2 No. 2 (2025): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v2i2.31
<![CDATA[The purpose of this research is to determine the relationship between the content of nitrogen, phosphorus and soil potassium on the quality of Sidimpuan snake fruit fruit based on the height of the location. This research was carried out at two different elevations with low and high location criteria at six points.coordinates such as the sub-districts of Palopat Maria, Sigordang, Lobu Layan, Huta Ginjang, Sibio-bio, and Huraba Village, starting from April to May 2024. Meanwhile, soil analysis was carried out at the Andalas University Padang Lab. The results of this research are that the comparison of altitude with the quality of sidimpuan snake fruit has a significant effect on the percentage of sidimpuan fruit flesh. Meanwhile, the relationship between soil nitrogen, phosphorus, potassium and the quality of Sidimpuan snake fruit based on altitude has a significant effect on the dissolved solids content in the lowlands, and the relationship between soil phosphorus and potassium nitrogen content on observing the percentage of fruit flesh in the highlands and lowlands has no real effect. significantly]]>
<![CDATA[Identification of Morphological Characteristics of Sidimpuan Snake Fruit (Salacca sumatrana Becc.) ]]>
<![CDATA[Edih Nasution, Halida]]>;
<![CDATA[Rasmita Adelina]]>;
<![CDATA[Sutan Pulungan]]>;
<![CDATA[Yusriani Nasution]]>;
<![CDATA[Nuzul Hijri Darlan]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 2 No. 2 (2025): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v2i2.32
<![CDATA[Sidimpuan snake fruit (Salacca sumatrana Becc.) plants have several varieties, one of which has a distinctive feature in the taste and colour of the fruit flesh. The results of the study from the three locations in Padangsidimpuan City obtained the morphological characteristics of sweet snake fruit (less) having a round oval to long triangular shape with brown to yellowish-brown fruit skin colour. The results of the dendrogram of the sidimpuan snake fruit (Salacca sumatrana Becc) kinship relationship based on the morphological characters of five types of salak, namely sweet snake fruit(less), sweet snake fruit (moderate), sweet snake fruit, white snake fruit, and red snake fruit, obtained 3 clusters from each location. Lubuk Raya Village, the Sidimpuan snake fruit kinship relationship based on five types of snake fruit, has a similarity level of 84 %. Batu Layan Village, the Sidimpuan snake fruit kinship relationship based on five types of snake fruit, has a similarity level of 92 %, and Palopat Maria Village, the Sidimpuan snake fruit kinship relationship based on five types of snake fruit, has a similarity level of 96 %. The results of the identification of morphological characters of snake fruit from three research locations based on the morphological characters of five types of snake fruit show genetic similarities, namely in the shape of the stem, leaf shape, upper leaf colour, lower leaf colour, leaf sheath colour, thorn colour, flower colour, fruit shape, and fruit skin colour]]>
<![CDATA[Agriculture Development Strategy Shallots (Allium Ascalonicum L) in Kota Padangsidimpuan ]]>
<![CDATA[Amran Jambak, Ali]]>;
<![CDATA[Sutan Pulungan]]>;
<![CDATA[Erwin Syah Lubis]]>;
<![CDATA[Rasmita Adelina]]>;
<![CDATA[Juli Yusran]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 2 No. 2 (2025): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v2i2.33
<![CDATA[This Research aims to develop a strategy for the development of shallots in Padangsidimpuan. The research used SWOT analysis. It is SWOT matrix which is produce four strategy alternatives. Thsi Swot analysis can describe how is the opportunitis and external threats which is faced by the company. It also describes its strengths and the weaknesses. The result shows that the strategy to increase onion production in the study area is an aggressive strategy and SO strategy (Strengths – Oppurtunities) by using the strength and taking the existence of opportunities with some activities as follows: (1) increasing the stimulus to develop the onion for the farmer and the groupof farmer in Padangsidimpuan. (2) increasing the quality of the farmer by conducting the development of shallots, such as giving training and technical guidance. (3) improving mentoring nad supervision of farmers through formal activities. (4) formulate the system of goverment policies or regulations that are able to create a condusive atmosphere and business climate in the cultivation and trading shallots]]>
<![CDATA[Design of a Pitot Tube Cover with Smart Motion Detection Using Arduino and a Waterproof Ultrasonic Sensor for the Piper Seneca Aircraft ]]>
<![CDATA[Untung L.N. Wibowo]]>;
<![CDATA[Rizky Oscera E.]]>;
<![CDATA[Dimas Endrawan Putra]]>;
<![CDATA[Wisnu Kuncoro]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 2 No. 2 (2025): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v2i2.34
<![CDATA[The research addressed the persistent issue of flight safety risk posed by failure to remove pitot tube covers during pre-flight checks on small aircraft, specifically the Piper Seneca V. An innovative solution was devised using a smart pitot tube cover integrated with a motion detection system based on waterproof ultrasonic sensors and an Arduino Uno microcontroller. The cover was designed to trigger a buzzer alarm automatically when movement was detected near the pitot tube and the cover remained installed. The development process involved both qualitative and quantitative approaches by incident interviews with pilots and instructors, design and assembly of hardware components, and field-experimentation on operational aircraft. The system underwent rigorous laboratory and real-world testing over a period of six months, covering various weather conditions and operational scenarios. Results demonstrated that the system reliably detected human presence within a 1–3 meter range, maintained a low error rate (average 4.2%), and produced an alarm response in under 310 milliseconds. In all test cases, the active system led to prompt inspection and removal of the pitot tube cover, thereby significantly reducing the risk of oversight. The final product exhibited robust performance, energy efficiency, and environmental resilience due to the use of waterproof materials and optimised component integration. It was concluded that the smart cover system enhances operational safety and awareness, offering a pragmatic preventive tool for the aviation training sector.]]>
