Competing interests

The authors declare that they have no competing interests.

Publisher's Note

Sekolah Tinggi Ilmu Pertanian Wuna remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Open Access

This article is distributed under the terms of the Creative Commons International License URL (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Supplementary files

Data sharing not applicable to this article as no datasets were generated or analysed during the current study, and/or contains supplementary material, which is available to authorized users.