Devianti, Devianti, Sufardi Sufardi, Mustaqimah Mustaqimah, and Agus Arip Munawar. “Near Infrared Technology in Agricultural Sustainability: Rapid Prediction of Nitrogen Content from Organic Fertilizer”. Transdisciplinary Journal of Engineering & Science 130 (February 17, 2022). Accessed April 28, 2024. http://atlas-tjes.org/index.php/tjes/article/view/196.