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.
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<![CDATA[The Role of Liquid Smoke and Biochar Planting Media on Shallot Growth and Production (Allium ascalonicum L) ]]>
<![CDATA[Harahap, Seri Juni Yanti]]>;
<![CDATA[Rasmita Adelina]]>;
<![CDATA[Dini Puspita Yanty]]>;
<![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.v3i1.38
<![CDATA[Shallots (Allium ascalonicum L.) are a horticultural commodity with high sales value and a complete nutritional profile.. This study was conducted in Padang Lawas Regency from February to April 2025. The research method is an experimental study, using a factorial randomized block design. The first factor is Liquid Smoke consisting of 3 levels, namely: A0 = Without giving liquid smoke, A1 = Liquid smoke 70 ml / L, A2 = Liquid smoke 90 ml / L. Factor II is the provision of rice husk biochar with soil consisting of 3 levels, namely: B0 = Without giving rice husk biochar B1 = rice husk biochar 210 gr / polybag, B2 = rice husk biochar 300 gr / polybag, The parameters observed are Plant Height (cm), Number of Leaves (strands), Number of Bulbs Per Clump (bulbs), Wet Weight of Bulbs Per Clump (grams), Dry Weight of Bulbs Per Clump (grams) and Bulb Weight Loss (%). The data obtained were analyzed using statistical analysis of variance followed by the Least Significant Difference Test (LSD). The results of the study showed that the application of liquid smoke significantly affected growth (plant height) in the early vegetative phase (14 days after planting) and significantly affected shallot production (number of bulbs per clump). The use of liquid smoke at a treatment level of 70 ml/L and biochar at a treatment level of 300 g/polybag produced the best results for shallot cultivation.]]>
<![CDATA[The Effect of Moringa Leaf Liquid Organic Fertilizer and Trichoderma on Growth and Yield of Lettuce (Lactuca sativa L.) ]]>
<![CDATA[Narudi, Narudi]]>;
<![CDATA[Rasmita Adelina]]>;
<![CDATA[Dini Puspita Yanty]]>;
<![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.v3i1.39
<![CDATA[Lettuce (Lactuca sativa L.) is a vegetable with numerous benefits and high economic value. The study was conducted in Neighborhood VI, Pasar Sibuhuan Village, Barumun District, Padang Lawas Regency, North Sumatra, in March 2025. The research method is an experimental study, using a factorial randomized block design. The first factor is liquid organic fertilizer of moringa leaves with 3 levels, namely P0 = Without giving liquid organic fertilizer of moringa leaves, P1 = liquid organic fertilizer of moringa leaves (120 ml/L), P2 = liquid organic fertilizer of moringa leaves (220 ml/L). The second factor is Trichoderma with 3 levels, namely T0 = Without Trichoderma, T1 = Trichoderma (20 gr/polybag), P2 = Trichoderma (30 gr/polybag). The parameters observed are plant height (cm), number of leaves (strands), leaf length (cm), leaf width (cm) and fresh weight (grams). The results of the study showed that the administration of liquid organic fertilizer from Moringa leaves significantly affected the initial vegetative growth (height, leaf length) and production of lettuce plants (P1 dose of 120 ml/L), while the Trichoderma treatment also significantly affected the growth and production of lettuce plants. The dose of 30 g/polybag (T2) had a positive effect, especially in increasing the number and width of leaves, as well as supporting the formation of plant biomass. The combination of moringa leaf POC and Trichoderma yielded the best results for lettuce growth and yield. The P1T2 treatment combination (120 ml/L and 30 g/polybag) was shown to produce the highest plant height and fresh weight.]]>
<![CDATA[The Effect of Cattle Manure Application and Bulb Tip Cutting on the Growth and Yield of Shallots (Allium ascalonicum L.) ]]>
<![CDATA[Hasibuan, Martuani]]>;
<![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]]>
