Guide for Manuscript Contribution

We welcome contributions from authors who wish to share their original research and scholarly insights in the field of agricultural science. To ensure the highest quality and relevance of published content, we kindly request that authors adhere to the following guidelines when preparing and submitting their manuscripts

1. Manuscript Preparation:

  • All submissions should be in English, adhering to internationally recognized standards for academic writing.
  • Manuscripts must be well-organized, structured, and formatted according to the journal's guidelines, promoting clarity and coherence.

2. Originality and Scope:

  • Submitted manuscripts should present original research findings, novel methodologies, or innovative perspectives within the realm of agricultural science.
  • Ensure that the content aligns with the aims and scope of the Thai Journal of Agricultural Science (TJAS), as outlined in our journal's description.

3. Title and Abstract:

  • Craft a concise and informative title that accurately reflects the content of the manuscript.
  • Provide an abstract that offers a clear overview of the research objectives, methods, key findings, and implications.

4. Keywords:

  • Select relevant keywords that succinctly capture the essence of the research, aiding in discoverability.

5. Structure:

  • Manuscripts should be logically organized into sections, such as Introduction, Materials and Methods, Results, Discussion, Conclusion, and References, as applicable.

6. Citations and References:

  • Follow standardized citation formats, providing accurate and complete references to all sources cited in the manuscript.
  • Cite recent and pertinent literature to place your research within the broader context of the field.

7. Figures and Tables:

  • Incorporate figures, tables, and illustrations where necessary to visually enhance the presentation of results.
  • Ensure that all figures and tables are appropriately labeled and referenced within the text.

8. Ethical Considerations:

  • Demonstrate ethical integrity by providing proper attribution to sources and avoiding any form of plagiarism.
  • Clearly disclose any conflicts of interest or potential biases.

9. Peer Review and Revisions:

  • Be prepared for the peer review process, during which your manuscript will undergo evaluation by experts in the field.
  • Address reviewers' comments and suggestions diligently and comprehensively when making revisions.

10. Manuscript Submission:

  • Submit your manuscript through the journal's online submission system, following the provided instructions.
  • Ensure that your submission includes all required elements, such as supplementary files, figures, and author information.


Manuscript Submission Guidelines

When submitting a manuscript to the Thai Journal of Agricultural Science (TJAS), authors affirm that their work has not been previously published, is not under consideration elsewhere, and has received the necessary approvals from all contributing authors and relevant authorities. Furthermore, authors agree that if the manuscript is accepted for publication, it will not be replicated in the same or similar form, whether in English or any other language, without the written consent of the Publisher.

To facilitate the review process, authors are kindly requested to adhere to the following submission guidelines:

1. Referees and Contact Information: Authors should provide the names and email addresses of five potential referees during submission, with at least two being English-speaking natives.

2. Electronic Format Preferred: Manuscripts are preferred in electronic format. Please submit a single MS Word document via our online submission portal at

3. Comprehensive Submission: Ensure that your submission includes all manuscript components, such as text, tables, and figures, compiled into a single file.


Preparation of Manuscript

Authors are requested to adhere to the following guidelines when preparing manuscripts for submission to the Thai Journal of Agricultural Science (TJAS):

1. Final Form Submission: Manuscripts should be submitted in their final form, as no further corrections or additions will be possible post-submission.

2. Language and Proofreading: Manuscripts must be written in English. Authors whose native language is not English are advised to seek assistance from a colleague proficient in English prior to submission.

3. Units: Please utilize SI units for consistency.

4. Formatting: Manuscripts should be prepared using Arial Font, 10 pt., with numbered lines, double-spacing throughout (including abstracts, footnotes, and references). The manuscript, including title, references, and tables, should be numbered consecutively. Maintain a margin width of 2.54 cm for all sides. Tables and figures, along with their captions, should follow the text, with each page of the manuscript numbered.

5. Organizational Structure: Organize your manuscript in the following sequence:

a. Title: Clear, descriptive, and concise.

b. Author Information: Include author names, affiliations, fax, and email details. Multiple authors should indicate the corresponding author.

c. Abstract

d. Keywords: List 4-6 keywords below the abstract for search enhancement.

e. Introduction

f. Materials and Methods

g. Results and Discussion

h. Conclusions

i. Acknowledgments

j. References

k. Tables

l. Figures and Figure Captions

6. Headings: Employ bold Roman type for main headings (Introduction, Materials and Methods, Results and Discussion, Conclusions, Acknowledgments, References), and light italic type for minor headings.

7. References: Ensure that all references mentioned in the text are listed in the References section. Cite references chronologically within the text, separated by semi-colons. List References alphabetically. Use a comma between the author's name and date in-text.

8. Figures and Symbols: Confirm that stippling and symbols in figures are legible at the anticipated publication size.

9. Tables: Make tables self-explanatory by including headings, headnotes, and footnotes.

10. Table and Figure Placement: Place tables and figures at the manuscript's end, each on a separate page. Indicate their approximate positions.

11. Numbering: Verify that figures and tables are numbered in the order they are discussed in the text.


Abstract of the Manuscript

1. Concise and Informative: Craft a clear, descriptive, and concise abstract, spanning 250-300 words. Succinctly outline your study's objectives, materials, results, conclusions, and applications in a manner easily understood.

2. Scientific Dissemination: Recognize the abstract's role as a condensed representation of your research, aiding its dissemination through abstracting journals. It also serves as a quick reference for readers seeking an overview of your work.

3. Structured Presentation: Ensure your abstract follows the structure of "Background and Objectives," "Methodology," "Main Results," and "Conclusions." Present your study's core elements under these headings.

4. Clarity and Independence: Write your abstract in complete sentences using standard terminology. Avoid referencing external sources, allowing the abstract to stand independently.

5. Abbreviations and Definitions: Minimize the use of non-standard or uncommon abbreviations. When necessary, provide clear definitions upon their initial mention within the abstract.


Keywords of the Manuscript

Select keywords that aptly represent the content of your manuscript, aiding in its discoverability and classification. Include no more than 5 relevant keywords, carefully chosen to encapsulate the essence of your research.


Table Preparation

When preparing tables for submission to the Thai Journal of Agricultural Science (TJAS), please adhere to the following guidelines:

1. Optimal Sizing and Layout: Be mindful of the Journal's layout and size limitations. Avoid overly large tables. Reorganizing columns and rows can often help reduce table dimensions effectively.

2. Division for Clarity: For presenting extensive data, consider dividing them into two or more tables for enhanced clarity and readability.

3. Drawn Tables: If you create tables that will be printed, ensure they are not folded, preserving their quality for reproduction.

4. Sequential Numbering: Number tables according to their appearance in the text sequence. Your manuscript's text should refer to each table by its corresponding number.

5. Clear and Concise Titles: Provide each table with a concise and self-explanatory title, facilitating swift comprehension.

6. Explanatory Column Headings: Keep column headings brief yet adequately explanatory. Include standard unit abbreviations within parentheses.

7. Column Separation: Refrain from using vertical lines to separate columns. Instead, create additional space between columns for improved visual separation.

8. Footnote Explanations: If necessary for clarity, provide any essential explanations in a footnote placed at the bottom of the table.


Picture Preparation

When preparing pictures (figures) for submission to the Thai Journal of Agricultural Science (TJAS), please adhere to the following guidelines to ensure optimal quality and effective communication of your research findings:

1. Resolution and Quality:

  • Provide high-resolution images with a minimum resolution of 300 dpi (dots per inch) for clear and detailed visuals.
  • Images should be sharp and free from pixelation or blurriness.

2. File Formats:

  • Preferred file formats include TIFF, JPEG, and PNG.
  • Ensure that the chosen format maintains the image's quality and does not introduce compression artifacts.

3. Legibility and Clarity:

  • Ensure all text, labels, and symbols within the picture are easily readable, even after resizing.
  • Use contrasting colors for clarity and accessibility.

4. Sizing and Dimensions:

  • Resize images to fit within the Journal's layout while maintaining their clarity.
  • The width of images should ideally be around 8-10 cm for single-column layout or 17-20 cm for double-column layout.

5. Numbering and Titles:

  • Number pictures sequentially according to their appearance in the text.
  • Provide a concise and descriptive caption or title for each picture, explaining its content and relevance.

6. Referencing:

  • In your manuscript, refer to each picture by its corresponding number, e.g., "Figure 1"

7. Consistency and Styling:

  • Maintain a consistent style throughout your pictures, including font type, size, and labeling style.
  • Ensure uniformity in line thickness, shading, and symbols.

8. Permissions and Credits:

  • Obtain necessary permissions for copyrighted images and provide proper credits for images sourced from external references.

9. Placement:

  • Place pictures after the paragraph in which they are first referenced or in a separate section at the end of the manuscript.

10. Accessibility:

  • Ensure that the content of your pictures is accessible to all readers, including those with visual impairments. Provide alt text descriptions for images to enhance accessibility.


References Guidelines

1. Inclusion in the References List: All references cited in the manuscript's text should be meticulously compiled in a References list, placed after the main text. A thorough cross-check is essential to ensure precise alignment of authors' names and dates between the text and the reference list.

2. Citations in the Text: Within the manuscript text, refer to the author's surname (excluding initials) and the publication year, followed by a concise citation of specific pages if applicable. For instance, "Peterson (1988) demonstrated..." or "This corresponds with later findings (Kramer, 1989)."

3. Multiple Authors' References: In cases of references by more than two authors, employ the first author's name followed by "et al." within the text. However, this abbreviation should not be applied in the reference list, where both first authors and co-authors must be specified.

4. Sequential Arrangement: References cited together within the text should be chronologically organized. The reference list itself should follow an alphabetical order by authors' surnames, and within each author, a chronological sequence. If an author is cited with co-authors, arrange entries as follows: publications by the individual author, chronologically ordered; publications by the same author with one co-author; publications by the author with multiple co-authors. In cases where identical author(s) have publications in the same year, employ labeling such as 1974a, 1974b, and so on.

5. Structured Referencing: Follow this structured system for reference organization:

a. For Periodicals:
Schmitt, E.R. and W. Feucht. 1983. Content of linolenic acid in senescing cherry leaves. Sci. Hort. 55: 273-282.

b. For Edited Symposia, Special Issues, etc. Published in Periodicals:
Rice, K. 1992. Theory and conceptual issues, pp. 9-26. In: G.A.E., Gall and M. Staton, (Eds.), Integrating Conservation Biology and Agricultural Production. Agriculture Ecosystems and Environment 42.

c. For Books:
Krinsley, D.H. and J.C. Doornkamp. 1973. Atlas of Quartz Sand Surface Textures. Cambridge University Press, Cambridge.

d. For Multi-Author Books:
Day, D.R. 1965. Particle fraction and particle size analysis, pp. 545-566. In: C.A. Black, (Ed.), Methods of Soil Analysis, Part I. Agronomy No. 9. Am. Soc. of Agron. Inc., Madison, Wisconsin, USA.

6. Title Abbreviations: Employ abbreviations for periodical titles in accordance with the International List of Periodical Title Word Abbreviations.

7. Work "In Press": References indicating works accepted for publication but not yet published should be labeled as "in press."

8. Personal Communications and Unpublished Data: While references regarding unpublished data and "personal communications" are not to be included in the reference list, they may be appropriately cited within the text.


Guidelines for Writing Formulae

1. Presentation of Formulae: Whenever possible, formulae should be neatly typewritten, allowing for sufficient white space around them to ensure clarity.

2. Subscripts and Superscripts: Ensure that subscripts and superscripts are distinct and legible, contributing to the formula's intelligibility.

3. Clarity of Non-Latin Symbols: Greek letters and other non-Latin or handwritten symbols should be clarified in the margin upon their first usage. Pay meticulous attention to distinguish zero (0) from the letter O, and one (1) from the letter 1.

4. Symbol Explanations: Immediately after an equation's presentation, provide the meanings of all symbols employed within it.

5. Fraction Representation: Utilize the solidus (/) for straightforward fractions, instead of employing a horizontal line.

6. Equation Numbering: Equations should be sequentially numbered within parentheses at the right-hand side. Typically, only equations specifically referenced in the text require numbering.

7. Fractional Powers and Exponential Notation: Prefer fractional powers over root signs for clarity. Powers of 'e' can be denoted more conveniently as 'exp'.

8. Statistical Significance Levels: Levels of statistical significance, which can be mentioned without further explanation, are denoted as “P”.

9. Chemical Formulae: In chemical formulae, indicate ion valence, e.g., Ca2+ instead of Ca++.

10. Isotope Representation: For isotope notation, place the isotope number before the symbol, e.g., 18O.

11. Minimization of Repetition: Whenever feasible, avoid repetitive presentation of chemical formulae within the text. Instead, provide the complete compound name. Exceptions may be applicable, such as using a shortened form for frequently recurring lengthy names or when denoting a compound as the final result of a gravimetric determination (e.g., phosphate as P2O5).