Kasim, Nurlina. “Application of N-15 Technique for Quantification of N-Fertilizer and N-Soil Uptake in Difference Maize Varieties”. Jurnal Ilmiah Aplikasi Isotop dan Radiasi 9, no. 1 (October 3, 2013): 45–58. Accessed December 6, 2025. https://ejournal.brin.go.id/jair/article/view/7258.