Supplementary information

Anti-plagiarism at PJA is addressed on three levels:

authors sign a statement declaring that they are not infringing any copyright in the article,
reviewers are obliged to inform the editors of plagiarism (question in the review form),
the editors verify the submitted papers using the anti-plagiarism mode offered in the Grammarly premium software package.

Disclosure of conflict of interests

Authors declare a conflict of interest in submitting a paper to a journal.

Information about the absence or presence of a potential conflict of interests is included in the article. The declaration of conflict of interest is disclosed at the request of the persons concerned.

Processing of complaints and requests

The complaints and requests should be addressed to the PJA editorial secretary.
Responses are provided within 20 calendar days of the acknowledgement of receipt of the complaint/request.

Publication fees

Authors do not incur any costs for publication of an article in the Polish Journal of Agronomy. If these preferential conditions are changed, the fees will apply only to authors whose submissions are received by the editorial office after the date of the fee announcement on the journal's website.

Suppose authors, despite positive reviews and acceptance of the paper by the PJA editor-in-chief, withdraw the article from the editorial office. In that case, they will be charged the costs of the review and editorial procedure incurred by the Institute (up to 500 PLN/PLN).

The payment is charged on a case-by-case basis depending on the size of the reviewers' fees.

The Institute issues an invoice with a 14-day payment period to the name of the corresponding author and the address given when submitting the paper to the PJA.

Archiving the materials

The materials concerning published papers (submitted version, reviews, revised version) are retained in the editorial office for five years from the submission year and subsequently forwarded to the National Archives.

The unpublished manuscript materials are maintained in the editorial office for two years from the year of submission and then destroyed.

The texts of published articles are stored in the National Library repository.