Indriani, S., D. Suryati, H. Pujiwati, P. Prasetyo, and E. I. Sukarjo. “Growth and Yield Component of Two Varieties of Soybeans (Glycine Max L. Merril) in Some Types of Amelioration in Ultisol”. TERRA : Journal of Land Restoration, vol. 4, no. 1, June 2021, pp. 9-16, doi:10.31186/terra.4.1.9-16.