Gusmara, H., Silitonga, R.H. and Simanihuruk, B.W. 2020. Growth Response and Yield of Sweet Corn on Palm Oil Sludge and Dolomite in Ultisols. TERRA : Journal of Land Restoration. 3, 1 (Jun. 2020), 1–9. DOI:https://doi.org/10.31186/terra.3.1.1-9.