Nuryanto E, Gouw E. ANALYSIS OF MACRONUTRIENS CONTENTS IN SOIL WITH NEAR INFRA RED (NIR) SPECTROSCOPY. J. Penelitian Kelapa Sawit [Internet]. 2017Aug.1 [cited 2024Oct.18];25(2):85-4. Available from: https://jurnalkelapasawit.iopri.org/index.php/jpks/article/view/27