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, H., Hikmah, N., & Khumaidi, A. (2024). Optimization of Preprocessing Spectra and Modeling Using Machine Learning for Prediction of Agricultural Soil Nutrients. Jurnal Ilmiah Merpati (Menara Penelitian Akademika Teknologi Informasi), 12(2), 83-93. doi:10.24843/JIM.2024.v12.i02.p01