SimatupangR. S., and IndrayatiL. “Pengarub Pemberian Kompos Gulma Somber Hara NPK Terbadap Tanaman Padi Di Laban Sulfat Masam”. Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy), Vol. 31, no. 2, 1, doi:10.24831/jai.v31i2.1464.