SimatupangR. Smith, and IndrayatiL. 1. “Pengarub Pemberian Kompos Gulma Somber Hara NPK Terbadap Tanaman Padi Di Laban Sulfat Masam”. Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) 31 (2). https://doi.org/10.24831/jai.v31i2.1464.