7 articles for “North Sumatra”

Research ArticleOpen accessPhrase in the titleBiodiversity and Spatial Distribution of Hornbills in Pondok Buluh Educational Forest, North Sumatra, IndonesiaBudi Utomo, Nabillah Saraswita, Cindy Siahaan et al.Hornbills are large birds, several species of which are protected under national and international conservation legislation and face significant extinction risk. This study was conducted in the Specific Purposes Pondok Buluh Forest Area, North Sumatra, Indonesia, with the aim of identifying hornbill species present, estimating their population density, and characterizing their habitat. Hornbill surveys were carried out using the point … …OnLine Journal of Biological Sciences, Vol. 26, Issue 1 · 28 Mar 2026 · 1,405 accessesView PDF Cite

Research ArticleOpen accessPhrase in the titleScreening of Blast Resistance Genes from South Tapanuli Rice Cultivars, North Sumatra, IndonesiaSaleha Hannum, Hesti Wahyuningsih, Riyanto Sinaga et al.Rice blast disease caused by a phytopathogenic fungus, Magnaporthe oryzae, has been considered as a major threat to global rice productivity, including Indonesia. South Tapanuli is a regency in North Sumatra, known for its intensive and significant rice production activities. A collection of 13 rice cultivars originating from the region, is claimed for its resistances against the rice blast disease … …OnLine Journal of Biological Sciences, Vol. 20, Issue 2 · 25 May 2020 · 7,537 accessesView PDF Cite

Research ArticleOpen accessPhrase in the titleIonospheric Total Electron Content Response to the December 26, 2004 North Sumatra EarthquakeA. Abdullah, A. F.M. Zain, M. H. Jusoh et al.Problem statement: Ionospheric precursors of earthquake have been studied by scientists and seismologists. This study aims at examining the relationship between the ionosphere and earthquake precursors. The effects of the anomalous electric field that penetrates the ionosphere on the electron concentration can be measured experimentally. This study reports on the variability of the Total Electron Content (TEC) during the December … …American Journal of Applied Sciences, Vol. 6, Issue 4 · 30 Apr 2009 · 7,908 accessesView PDF Cite

Research ArticleOpen accessIn the abstractFirst Morphoanatomical and Cytogenetic Characterization of Picria fel-terrae Lour.: A Local Accession from Dairi Regency, IndonesiaElimasni, Deny Supriharti, HaryatiPoguntano (Picria fel-terrae Lour.) plant has been widely recognized for its medicinal properties due to its bioactive compounds. However, fundamental biological studies, particularly on its phenological and cytogenetic characteristics, remain limited. This study aimed to characterize the vegetative morphology and karyotypic features of P. fel-terrae from Dairi Regency, North Sumatra, to provide a comprehensive cytogenetic database for future study and … …OnLine Journal of Biological Sciences, Vol. 26, Issue 2 · 17 Jul 2026 · 745 accessesView PDF Cite

Research ArticleOpen accessIn the abstractCommunity Participation in Mangrove Conservation and Ecosystem Assessment in Tanjung Rejo, IndonesiaFinny Juniyanti Nasution, Mohammad Basyuni et al.Mangrove forests located in the intertidal zones of tropical and subtropical areas exhibit distinct characteristics and offer a range of potential advantages for human life. These mangroves should be conserved for sustainability. Therefore, the local community should participate in mangrove forest management to get the benefits directly. This study searched for to (1) identify the mangrove forest ecosystem and (2) … …OnLine Journal of Biological Sciences, Vol. 25, Issue 2 · 12 Jun 2025 · 3,890 accessesView PDF Cite

Research ArticleOpen accessIn the abstractInfluence of Mineral Fertilizers and Methods of Basic Tillage on the Yield and Oil Content of SunflowerBeybit Nasiyev, Aida DukeyevaThe purpose of the study was to evaluate the influence of mineral fertilizers and methods of basic tillage on the yield and oil content of sunflowers in the north of Kazakhstan. The experiment was conducted in the agricultural experimental Station Zarechnoye limited liability partnership with southern thin chernozem soils. Records and observations of the growth and development of sunflowers were … …OnLine Journal of Biological Sciences, Vol. 23, Issue 3 · 23 May 2023 · 5,254 accessesView PDF Cite

Research ArticleOpen accessIn the abstractDensity and Population Estimation of the Bornean Elephants (Elephas maximus borneensis) in SabahRaymond Alfred, Abd Hamid Ahmad, John Payne et al.Problem statement: In Asia, four elephant subspecies have been identified, Elephas maximus maximus from Sri Lanka, Elephas maximus summatranus from Sumatra, Elephas maximus borneensis (based on recent DNA analysis) from Borneo and Elephas maximus indicus, from mainland Asia. The Bornean elephant has a limited distribution and is found only in the northeastern part of the island, (Malaysian Sabah and Indonesian … …OnLine Journal of Biological Sciences, Vol. 10, Issue 2 · 30 Jun 2010 · 20,197 accessesView PDF Cite