Warning: file_get_contents(https://ojs.journalbusiness.my/ojs.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /var/www/ojs.unud.ac.id_backup/lib/pkp/includes/functions.inc.php on line 4 KARTIKA, Harry Dwiyana; HIKMAH, Nur; KHUMAIDI, Ali. Optimization of Preprocessing Spectra and Modeling Using Machine Learning for Prediction of Agricultural Soil Nutrients. Jurnal Ilmiah Merpati (Menara Penelitian Akademika Teknologi Informasi), [S.l.], v. 12, n. 2, p. 83-93, nov. 2024. ISSN 2685-2411. Available at: <https://ojs.unud.ac.id/index.php/merpati/article/view/110929>. Date accessed: 30 aug. 2026. doi: https://doi.org/10.24843/JIM.2024.v12.i02.p01.