https://soilenvironment.com/index.php/OSSE <div style="max-width: 800px; margin: 0 auto;"> <div style="display: flex; flex-wrap: wrap; gap: 15px; align-items: flex-start; padding: 15px; border-radius: 12px; background: linear-gradient(135deg,#ffffe0,#fde7e3); box-shadow: 0 4px 10px rgba(0,0,0,0.1); border: 1px solid #ddd;"> <div style="flex: 0 0 200px;"><img style="width: 100%; max-width: 200px; height: auto; border-radius: 8px; box-shadow: 0 4px 8px rgba(0,0,0,0.15); display: block;" src="https://soilenvironment.com/public/site/images/Admin/cover-issue-7-en-us-1.png" alt="Journal Cover" /></div> <div style="flex: 1 1 320px; min-width: 0; line-height: 1.6; font-size: 14px; color: #444;"> <h3 style="margin: 0 0 6px 0; color: #ee4b2b;">Open Soil Science and Environment</h3> <p style="margin: 6px 0;"><strong>e-ISSN:</strong> <a class="animated-link" href="https://portal.issn.org/resource/ISSN/2988-022X" target="_blank" rel="noopener">2988-022X</a><br /><strong>Journal Initials:</strong> OSSE<br /><strong>DOI Prefix:</strong> prefix by <a href="https://search.crossref.org/?q=2961-7952&amp;from_ui=yes" target="_blank" rel="noopener">Crossref</a><br /><strong>Publisher:</strong> <a href="https://www.ressi.id/" target="_blank" rel="noopener">Research and Social Study</a><a href="https://www.ressi.id/" target="_blank" rel="noopener"> Institute</a><br /><strong>Frequency:</strong> 2 Issues per year (March and September)<br /><strong>Language:</strong> English or Indonesian<br /><strong>Editor-in-Chief: </strong><a href="https://scholar.google.co.id/citations?hl=id&amp;user=llPI3wkAAAAJ&amp;view_op=list_works&amp;sortby=pubdate" target="_blank" rel="noopener">Ali Rahmat, Ph.D.</a></p> <p style="margin: 6px 0;"><strong>Citation Analysis:</strong> Sinta | Garuda | Google Scholar</p> <p style="margin: 10px 0 0 0;"><a style="display: inline-block; background: #ee4b2b; color: #fff; text-decoration: none; font-weight: bold; padding: 8px 15px; border-radius: 6px; box-shadow: 0 3px 6px rgba(0,0,0,0.2); font-size: 14px;" href="https://soilenvironment.com/index.php/OSSE/about/submissions" target="_blank" rel="noopener"> Submit your manuscript » </a></p> </div> </div> <p style="margin: 14px 0 0 0;"><strong>Open Soil Science and Environment (OSSE)</strong> is an International Journal is an open access peer reviewed journal that covers the publication of all aspects of Environmental Sciences with firm determinations of description on the modern study achievements and developments. 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The experiment was laid out in randomized complete block design, replicated three times. Growth and yield data were collected. All growth and yield data collected were subjected to analysis of variance. Significant means were tested with LSD at 5% probability level.<br /><strong>Result:</strong> Among the fertilizer treatments, the treatment of 5t/h PM produced significant storage root yield of 32.18 and 31.16t/ha. Application of 5t/ha of EFBA produced 25.17 and 25.23t/ha of storage root yield in 2024 and 2025 cropping seasons, respectively. The treatment of 400kg/ha of NPK 15:15:15 fertilizer produced 27.24 and 28.80 t/ha storage root yield. The result showed that the treatment of poultry manure produced 15-43% and 9-47% higher storage root yield compared to the other treatments in both cropping seasons. PM treatment generated the highest economic returns across both cropping seasons, yielding N 4,020,700 and N 4,119,000 for the 2024 and 2025 seasons, respectively. The cost-benefit ratio for the PM treatment was recorded at 3.12 and 3.09, while the CD treatment had benefit ratios of 2.54 and 2.83.<br /><strong>Conclusion:</strong> For high yield and economic returns to management. The study therefore recommended the application of poultry manure, followed by Cow Dung (CD) and oil palm empty fruit bunch ash (EFBA).</p> Ikopima Uwemedimo Thomas Ofonime Raphael Akata Patrick Ibanga Udounang Fidel Ekanikpong Ben Copyright (c) 2025 Ikopima Uwemedimo Thomas, Ofonime Raphael Akata, Patrick Ibanga Udounang, Fidel Ekanikpong Ben https://creativecommons.org/licenses/by-sa/4.0/ 2025-12-27 2025-12-27 3 2 48–55 48–55 10.70110/osse.v3i2.49