Instructions for authors

1. General

1.1 This journal publishes original and unpublished scientific articles, technical notes, brief communications, and solicited reviews and articles from authors interested in agronomy and animal science areas.
1.2 Manuscripts for publication and related editorial communications should be sent to the Editor in Chief of the Revista de la Facultad de Agronomia, Universidad del Zulia, Institute of Agriculture Research, University Area. Agronomy campus. Ziruma Av. Maracaibo. Zulia state, zip code 15205, ZU 4005. Venezuela. E-mail: . Fax: (58 261) 4127110.
1.3 Manuscripts must be written in Spanish or English, with one abstract in Spanish and another abstract in English.
1.4 The article should not exceed 20 pages, including graphs and tables. The article should be accompanied by an authorization for publication signed by all authors. At least one of the authors must be a subscriber to the journal.

2. Presentation

2.1 Manuscripts should be transcribed in a word processor compatible with PC: MS-Word.
2.2 The page design should include the following parameters: letter size paper (8.5"x 11" or 21.59 cm x 27.94 cm), printed on one side and with ample margins (2.5 cm), double spaced and with line numeration.
2.3 The articles must be divided into section according to the following order: Title in Spanish, Title in English, Authors, precise institutional address by including E-mail, Abstract and Key words in Spanish, Abstract and Key words in English, Introduction (by including bibliographical review), Methodology, Results and Discussion, Conclusions, Acknowledgements, Bibliographical References, Legends, Tables and Graphs.
2.4 Subventions and the name of the author to whom correspondence should be sent should appear on the first page as a footnote.
2.5 Capital letters should not be used except to initiate title words, sub-titles words, paragraphs, after periods at the beginning of a new sentence, and in proper names.
2.6 Quotes within the text should be indicated by following the modality author-date, for example:
Jimenez, 2007; (Jimenez, 2007); Jimenez (2007).
Ewel J. and A. Madriz, 2007. à Ewel and Madriz, 2007; Ewel and Madriz (2007).
Avilan, L., F. Leal and D. Batista 1992. à Avilan et al., 2007; Avilan et al. (2007).
Quotes should not be used in abstracts.
2.7 Once the article receipt, changes in authors are not allowed.

3. Abstracts

Abstracts should not exceed 250 words (150 for technical notes) by including justification, objectives, methodology, results and conclusions. They should be written as one double-spaced paragraph. At the end of each abstract three (3) to six (6) key words should be placed which identify the content of the text.

4. Introduction

The introduction should include a justification, a brief review of recent literature on the topic, and finish with the objectives of the study.

5. Methodology

The methodology should specify the materials used during the development of the research, including registered names if it be the case. As far as possible methods and techniques employed should be specified by references, unless they are new or rarely used and unusual. Statistical methods employed should be specified as well as software employed in the process. This section should be ordered chronologically and in such a way that another researcher could repeat the process. References can be made to tables, figures and diagrams. Decimal numbers should be indicated by a coma (,).

6. Results and discussion

The results should be analyzed on the basis of previous research results and in relation to biological mechanisms and processes, pointing out the relevant findings of the research. It is important to end this section with a paragraph wherein the practical or theoretical implications of the research are explained.

7. Conclusions

8. Recommendations (optional)

9. Literature cited.

9.1. The literature cited should be of easy access to any reader. Graduate thesis references, documents from scientific events and mimeographed works should be avoided.
References should be ordered alphabetically.
9.2. Conventional internationally accepted abbreviation should be used in reference to Journals and periodic publications (refer to the World List of Scientific Periodicals).
9.3. Articles from arbitrated journals.
Corona, M., A. Diaz, G. Páez, J. Ferrer, Z. Mármol y E. Ramones. 1996. Extracción y caracterización de pectinas de la corteza de parchita. Rev. Fac. Agron. (LUZ). 13(6):785-791.
9.4. Books.
Gardner, E.J., M.J. Simmons, and D.P. Snustad. 1991. Principles of genetics. Eighth edition. John Willey & Sons, Inc. New York.
9.5. Chapters from books.
Prins, R.A. and R.T. Clarke. 1980. Microbial ecology of the rumen. p. 179-204. En: Ruckebusch and P. Thivend (Eds.). Digestive physiology and metabolism in ruminants. First edition. AVI Publishing Company, Inc. Westport, Connecticut.
9.6. Technical Reports.
Comisión del Plan Nacional de Aprovechamiento de los Recursos Hidráulicos (COPLANARH). 1975. Atlas Inventario nacional de tierras. Región Lago de Maracaibo. Tecnicolor S. A. Caracas. Venezuela.
9.7. Governmental publications.
Morales, D., E. Fuenmayor, J. Colina, A. Sánchez y L. Arias. 1982. Diagnóstico agroecológico de la región zuliana. Fondo Nacional de Investigaciones Agropecuarias (FONAIAP). Serie C N° 1-05. FONAIAP Ed. Maracaibo. Venezuela.
9.8. Programs and software.
SAS Institute, Inc. 1985. SAS user’s guide: Statistics. 5th edition. SAS Inst., Inc., Cary, NC.

10. Tables, figures and graphs.

10.1. Tables should be included at the end of the text, in the same document (file)
Figures and diagrams should be constructed with black lines on a white
Background, by using either Harvard Graphics of MS-Power Point. The JPG, GIF, TIF or BMP formats can also be used.
Graphic prints sent should be Laser or Ink-jet impressions of the highest
Quality, printed on white paper and enclosed separately.
10.2. Tables, figures, diagrams and photographs should be identified with Arabic numbers (without the reference symbol «No.») and in consecutive order. On separate sheets the legends for figures diagrams and photos should be indicated separately.
10.3. The placement of tables, figures, photos and diagrams should appear in the margin of the text.
10.4. Titles for tables should be indicated above, while titles for figures and diagrams should appear below them as well as sources.
10.5. Reproductions of photographs should be sent digitalized. The quality of the photographs should be high (optimum). Authors want their photographs be published in color has to cover the reproduction cost.

12. Units

Meter m
Square meter m2
Liter L
Milliliter mL
Millimeter mm
Kilogram kg
Gram g
Second s
Minute min
Hour h
Hectare ha
Metric tons t
Temperature ºC

12. Abbreviations

Volatile fatty acide VFA
Standard deviation SD
Standard error SE
Gross fiber GB
Dry matter DM
Live weight LW
Crude protein CP
Meters above sea level masl
Potassium K
Phosphorus P
Nitrogen N
Organic matter OM

13. Nomenclature

13.1. Chemistry and biochemistry: Names of chemical compounds should be cited according to Chemical Abstracts (Chemical Abstracts Service, Ohio State University, Columbus) and its indexes.
13.2. Biochemical terminology, including abbreviations and symbols, should be in accord with the Commission of Biochemical Nomenclature (Commission of Biochemical Nomenclature, SUPAC-IUB).
13.3. It is possible the consultation of commonly used in: Journal of Animal Science, Journal of Biological Chemistry, Archives of Biochemistry and Biophysics and the Handbook of Biochemistry (Last editions).
13.4. Taxonomy. Binary nomenclature should be used in: only names, genus, and major categories should be used by including descriptor name in the first mention.
13.5. Genetics: The application of phenotype and genotype terms should be in accordance with Demerec et al. (Genetics 54:61-74).
13.6. Abbreviations and units: Only International System (IS) abbreviations and units should be used. Abbreviations not contemplated in IS or non-standard abbreviations should be explained when they appear for the first time in the text. Periods should not be used in abbreviations.

14. Final considerations

14.1. Once the results of arbitration are received, the author(s) should return the corrections in a period of no more than one (1) month; once this time pass, the journal is not responsible for the article management. When the paper has been accepted, the author(s) will be informed as to the probable date of publication.
14.2. When a paper is rejected, the author(s) may appeal to the Editor in chief in writing, offering arguments in favor of its publication. The Editorial Committee will consider the actions to be taken.
14.3. The author(s) will receive 10 free print-outs of their published article.
14.4. One of the authors must paid the annual subscription of the journal by making a deposit in name of: Revista de la Facultad de Agronomia (LUZ) Banco Occidental de Descuento, Cuenta Corriente No. 0116-0101-49-0005075350 and data and deposit copy must to be sent by Phone: 0261-8961590/4127109/4127124 telefax number: 0261-4127110 and/or e-mail:;; Further information please consult: