SOEDARSONO RlSWAN. “NITROGEN CONTENT OF TOPSOIL IN LOWLAND TROPICAL FOREST IN EAST KALIMANTAN (INDONESIA), BEFORE AND AFTER CLEAR-CUTTING AND BURNING”. Reinwardtia, vol. 10, no. 2, July 2025, pp. 131-8, https://biologyjournal.brin.go.id/index.php/reinwardtia/article/view/232.