Author Guidelines

Jurnal Online Pertanian Tropik (JOPT) welcomes original scientific manuscripts in agriculture and related disciplines within the journal's focus and scope. All manuscripts must be prepared in English, demonstrate scientific originality, and comply with the journal's manuscript preparation, publication ethics, and submission requirements.

1. Manuscript Preparation and Template

Manuscripts must be submitted in Microsoft Word format (.doc or .docx) using the official JOPT manuscript template. Authors must follow the formatting and layout provided in the template, including the prescribed margins, font styles, headings, tables, figures, and reference formatting.

Authors are required to download and use the official manuscript template before preparing their submissions.

⬇   Download Manuscript Template (Word)

The manuscript must be prepared using standard fonts and SI units for measurements. Authors should avoid unnecessary abbreviations and define non-standard terms or symbols when first introduced. The margins and layout of the official manuscript template must not be modified.

2. Manuscript Title and Author Information

Manuscript Title

The title should be concise, informative, and accurately reflect the main content of the research. Uncommon abbreviations should be avoided. The title must follow the capitalization and formatting provided in the official JOPT manuscript template.

Author Names and Affiliations

Authors' full names must be provided without academic degrees. Each author's institutional affiliation should include the department or research unit, faculty or institution, city, postal code, and country, as applicable. The corresponding author must be clearly identified and provide an active email address.

3. Abstract and Keywords

Abstract

The abstract must be written in Times New Roman, 10 pt, and must not exceed 250 words. It should provide a concise and self-contained summary of the research background, objectives, methods, principal findings, and conclusions or research novelty. Citations, uncommon abbreviations, and unnecessary technical details should be avoided.

Keywords

Authors must provide a maximum of five keywords or key phrases that accurately represent the manuscript's content. Keywords must be arranged in alphabetical order and separated by commas (,).

4. Manuscript Structure

The manuscript should follow the scientific article structure provided in the official JOPT template.

1. Introduction

The Introduction must present the research background, relevant scientific literature, current state of knowledge, and the research problem. Authors should critically discuss previous studies to identify research gaps and explain the scientific significance of the proposed research. The novelty and objectives of the study should be clearly stated at the end of the Introduction.

2. Method

The Method section must clearly describe the research design, location and period of study when applicable, materials, experimental procedures, sampling techniques, measured variables, and methods of data analysis. Statistical methods and analytical models should be explained where relevant. Sufficient methodological detail must be provided to allow the research to be evaluated and reproduced. Previously published methods should be appropriately cited, and modifications should be clearly described.

3. Result and Discussion

The Results and Discussion section must present research findings clearly and systematically, supported by appropriate data, tables, and figures. The discussion should provide scientific interpretations of the findings, explain their relevance to the research objectives, and compare the results with relevant previous studies. Authors should highlight significant findings, similarities or differences with earlier research, and the scientific contribution of the study. The discussion must go beyond merely repeating the results.

4. Conclusion

The Conclusion must directly address the research objectives and summarize the principal scientific findings. It should emphasize the contribution and implications of the research without simply repeating the Abstract or listing experimental results. Recommendations for future research may be included where relevant.

5. Acknowledgements

Authors should acknowledge financial support, research grants, institutional assistance, and individuals who contributed to the research but do not meet the criteria for authorship. Funding sources should be identified where applicable.

6. Conflict of Interest

Authors must disclose any financial, institutional, personal, or professional relationships that could influence, or reasonably be perceived as influencing, the research or its interpretation. If no conflicts of interest exist, authors should provide an appropriate declaration.

Declaration of Generative AI Use

Authors must include a declaration concerning the use or non-use of generative artificial intelligence and AI-assisted technologies in accordance with Section 7 of these guidelines.

References

All references must follow APA Style, Seventh Edition, and comply with the journal's reference requirements described in Section 6.

5. Tables, Figures, Equations, and Formatting

Tables

All tables must be numbered consecutively using Arabic numerals (Table 1, Table 2, etc.). Each table must have a descriptive caption placed above the table and aligned to the left. Only horizontal lines should be used to distinguish column headings and table boundaries. Tables must be embedded in the manuscript and placed close to their first citation.

Figures

All photographs, graphs, diagrams, and illustrations must be referred to as figures and numbered consecutively using Arabic numerals. Figures must be of sufficient quality, preferably at a resolution of 300 dpi. Figure captions must be placed below the illustrations, following the 8 pt formatting specified in the manuscript template. Figures must be embedded in the manuscript and positioned as close as possible to their first reference in the text.

Equations

Equations must be prepared using Microsoft Equation Editor, MathType, or an appropriate equation editor. Equations referred to in the manuscript must be numbered consecutively using Arabic numerals in parentheses and aligned to the right.

Section Headings and General Formatting

Main section headings must be numbered consecutively, left-aligned, bold, and formatted in 11 pt. Subsection headings should use consecutive numbering (1.1, 1.2, etc.) and follow the style provided in the template. Authors must maintain consistent formatting and use SI units for scientific measurements.

6. Citation and Reference Guidelines

JOPT adopts the American Psychological Association (APA) Style, Seventh Edition, for citations and reference list formatting. In-text citations must follow the author-date system. References must be accurate, complete, and relevant to the research topic.

Reference Requirements

  • Each manuscript must contain at least 20 references.
  • At least 80% of references must consist of scientific journal articles published within the last five years.
  • References published more than five years ago must not exceed 20% of the total references.
  • At least five references must be articles published in Jurnal Online Pertanian Tropik (JOPT).
  • All references cited in the manuscript must appear in the reference list, and all listed references must be cited in the manuscript.
  • Digital Object Identifiers (DOIs) should be provided when available.

In-Text Citation Examples

  • One author: (Sebayang, 2024)
  • Two authors: (Sembiring & Sebayang, 2025)
  • Three or more authors: (Sebayang et al., 2024)
  • Multiple references: (Sebayang et al., 2024; Sembiring et al., 2025)

Example of a Journal Article Reference

Sebayang, N. U. W., Hidayat, B., & Raju. (2024). Utilization of temperature control technology to improve the quality of Assyifa Black Garlic at the Utsman bin Affan Islamic boarding school. Jurnal Online Pertanian Tropik, 11(3), 1–5. https://doi.org/10.32734/jpt.v11i3.18183

For additional information on APA citation and reference formatting, please visit the official APA Style website.

7. Declaration of Generative AI Use

Authors must declare any use of generative artificial intelligence (AI) or AI-assisted technologies in the preparation of their manuscripts. If AI tools are used, authors must identify the tool or service and explain its purpose. Authors remain fully responsible for the accuracy, originality, integrity, and reliability of their manuscripts. AI tools must not be listed as authors.

If no AI tools were used:

The authors declare that no generative AI or AI-assisted technologies were used in the preparation of this manuscript.

If AI tools were used:

The authors used [NAME OF TOOL/SERVICE] for [PURPOSE]. All AI-assisted content was reviewed and verified by the authors, who take full responsibility for the final manuscript.

8. Publication Ethics and Required Documents

Submitted manuscripts must represent original scholarly work, must not be under consideration for publication elsewhere, and must comply with JOPT's publication ethics and plagiarism policies. All manuscripts are screened using Turnitin, with a maximum similarity threshold of 25%, subject to editorial evaluation.

Authors are required to complete the following documents:

  • Publishing Agreement & Statement of Originality (downloadable [here]). This agreement addresses copyright retention, the journal's non-exclusive right of first publication, originality, and publication ethics.
  • Manuscript Originality and Plagiarism Ethics Statement (downloadable [here]). This statement confirms manuscript originality, authorship approval, acknowledgment of sources, and compliance with ethical research practices.

9. Manuscript Submission

All manuscripts must be submitted electronically through the JOPT Online Submission System. Authors must register or log in to the journal website, complete the required submission information, upload the manuscript prepared using the official template, and provide the necessary supporting documents.

Authors are responsible for ensuring that the manuscript complies with all formatting, reference, ethical, and administrative requirements before submission. Manuscripts that do not meet the journal's requirements may be returned for technical revision before proceeding to editorial screening and peer review.

For further information, please visit the Jurnal Online Pertanian Tropik (JOPT) website.