Sondang, Yun, Khazy Anty, and Ramond Siregar. 2019. “The Effect of Biofertilizer and Inorganic Fertilizer Toward The Nutrient Uptake in Maize Plant (Zea Mays L.)”. Journal of Applied Agricultural Science and Technology 3 (2), 213-25. https://doi.org/10.32530/jaast.v3i2.121.