Rahmayanti, R., Pata’dungan2Y., and R. Amelia. “ANALISIS KADAR HARA MAKRO TANAH PADA PERTANIAN LAHAN KERING DI DESA MAKMUR KECAMATAN PALOLO KABUPATEN SIGI”. AGROTEKBIS : JURNAL ILMU PERTANIAN (e-Journal), Vol. 9, no. 4, June 2021, pp. 866 -76, http://103.245.72.23/index.php/agrotekbis/article/view/1026.