“Concentration of Potassium, Magnesium, and Iron of Brachiaria humidicola (Rendle Schweick) at Various Cultivation Methods and Defoliation Intervals”, JAP, vol. 8, no. 1, May 2011, Accessed: Oct. 31, 2026. Available: https://jap.fapet.unsoed.ac.id/index.php/JAP/article/view/1264