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
34 Documents
<![CDATA[The Effect of Cattle Manure Application and Bulb Tip Cutting on the Growth and Yield of Shallots (Allium ascalonicum L.) ]]>
<![CDATA[Martuani Hasibuan]]>;
<![CDATA[Rasmita Adelina]]>;
<![CDATA[Erwin Syah Lubis]]>;
<![CDATA[Sutan Pulungan]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 3 No. 1 (2026): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v3i1.40
<![CDATA[This study aimed to examine the effects of cow manure application and bulb tip cutting on the growth and yield of shallots (Allium ascalonicum L.). The observed parameters included plant height, number of leaves, number of bulbs per clump, fresh weight, dry weight, bulb diameter, and weight loss after storage. The results showed that the application of cow manure had a significant effect on early plant growth, particularly on plant height at 14 days after planting (p < 0.05), and also affected the number of leaves and bulbs per clump at manure doses of 50 g/polybag (A1), 100 g/polybag (A2), and 150 g/polybag (A3) compared to the control (A0). The bulb tip cutting treatment significantly influenced growth at ¼ (B1) and ⅓ (B2) cutting levels compared to no cutting, especially in the number of leaves and shoot emergence rate. The interaction between cow manure and bulb tip cutting also showed a significant effect. The best combination was obtained in A2B1 (100 g/polybag of cow manure + ¼ bulb tip cutting), which produced an average plant height of 39.17 cm, an average of 32.33 leaves at 35 days after planting, an average fresh bulb weight per clump of 159.67 g, and an average dry bulb weight per clump of 107.16 g. Therefore, this combination treatment can be recommended as a simple cultivation technique to enhance shallot productivity in low-fertility soils]]>
<![CDATA[Collision Diagram Analysis and Weighted Ranking of Accident-Prone Areas (Black Spots) on the Road Network of Padangsidimpuan City ]]>
<![CDATA[Ahmad Rafii]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 3 No. 1 (2026): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v3i1.48
<![CDATA[Padangsidimpuan City records traffic accidents concentrated on several road segments, yet mitigation efforts have generally focused on identifying accident-prone locations without examining collision characteristics. This study aims to rank accident-prone areas (black spots) using a multi-criteria weighting method, analyze collision patterns through collision diagrams, identify dominant contributing factors, examine the relationship between road geometry, vehicle speed, and accident patterns, and formulate segment-specific countermeasures. A quantitative descriptive approach was employed using 2021 traffic accident records from the Padangsidimpuan Traffic Police together with field surveys of road geometry and spot speeds. Black-spot ranking was based on casualty severity, road function, road status, and material losses. The results identified Jenderal Sudirman Road as the highest-ranked black spot (score = 49), followed by H.T. Rizal Nurdin Road (47), Abdul Haris Nasution 1 Road (35), Raja Inal Siregar Road (31), and Imam Bonjol Road (30). Collision diagram analysis identified head-on collisions as the dominant crash pattern, with Jenderal Sudirman Road recording the highest proportion (5 of 9 crashes; 55.6%). Human factors, particularly excessive speed and driver negligence, were the dominant contributing factors, reinforced by inadequate road infrastructure, including the absence of speed-limit signs, black-spot warning signs, and median separation. The study recommends speed management measures, installation of warning signs and rumble strips, median or centerline improvements, and implementation of a School Safety Zone (ZoSS) on school-front road segments. These findings provide practical guidance for transportation agencies and road authorities in prioritizing data-driven road safety improvements.]]>
<![CDATA[Pavement Condition Evaluation and Its Relationship with Traffic Loading on Kenanga Road Segment ]]>
<![CDATA[Ahmad Rafii]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 3 No. 2 (2026): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v3i2.49
<![CDATA[Kenanga Road in the City of Padangsidimpuan is a primary collector road that functions as a convergence point for traffic flows heading toward the city's Central Business District. A previous traffic engineering study on this segment identified a Volume-to-Capacity (V/C) ratio of 0.68 with an average speed of 24.50 km/h, but did not evaluate the physical and structural condition of the pavement as a factor influencing road performance. This study aims to evaluate pavement condition using the Pavement Condition Index (PCI) and International Roughness Index (IRI) across ten segments spanning 1,000 meters, and to analyze their relationship with cumulative traffic loading expressed as Equivalent Single Axle Load (ESAL). The study employs a quantitative descriptive-correlational approach using illustrative data calibrated against real traffic parameters from the prior survey. The analysis reveals a strong negative correlation between cumulative ESAL and PCI (R² = 0.95), and a strong positive correlation between PCI and segment operating speed (R = 0.99). The segments with the highest cumulative loading, located near the convergence point with Tapian Nauli Road, showed poor condition and the most significant reduction in operating speed. This study underscores the importance of integrating structural pavement evaluation into urban traffic management studies to ensure more targeted road maintenance interventions.]]>
<![CDATA[Comparison of the Chemical Quality of Sidimpuan Snake Fruit (Salacca sumatrana Becc.) Based on the Color of the Fruit Flesh ]]>
<![CDATA[Edi Darwan]]>;
<![CDATA[Rasmita Adelina]]>;
<![CDATA[Sutan Pulungan]]>;
<![CDATA[Nuzul Hijri Darlan]]>
<![CDATA[ International Journal of Natural Science Studies and Development (IJOSS) Vol. 3 No. 2 (2026): IJOSS ]]>
Publisher : <![CDATA[PT Inovasi Pratama Internasional ]]>
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DOI: 10.55299/ijoss.v3i2.50
<![CDATA[This study aims to determine the chemical character of sidimpuan snake fruit, the fruit consisting of vitamin C, total acid, moisture content, tannin content, and dissolved solids (brix) content from three locations, namely Lubuk Raya altitude 700 meters above sea level, Batu Layan is 500 meters above sea level, and Palopat Maria is 463 meters above sea level. The results of the study obtained in white sidimpuan snake fruit were that the vitamin C content of white sidimpuan snake fruit in Lubuk Raya and Batu layan was not significantly different but based on the highest average, the vitamin C content in Lubuk Raya was higher at 41.49% and significantly different from the vitamin C content of white sidimpuan snake fruit in Palopat Maria, which was 28.06 mg/100ml. The total content of dissolved acids was significantly different in Lubuk Raya with a value of 1.68% in Lubuk Raya and the tannin content was significantly different in Lubuk Raya with a value of 0.38 %,. The moisture content of white sidimpuan snake fruit was significantly different with a value of 79.22. % on Palopat Maria. The dissolved solids content of red sidimpuan snake fruit was significantly different with a value of 19.86% in Batu Layan, the observation of vitamin C content, total dissolved acid, water content, and tannin content in red sidimpuan snake fruit from the three locations showed no real difference between salak Lubuk Raya, Batu Layan, and Palopat maria.]]>
