RAUDHAH; ARIDAH.A. Geospatial Analysis of Nitrogen Efficiency: Correlating Subsidized Urea Distribution with National Rice and Maize Productivity Across Provinces. Chemistry Journal (CJ), [S. l.], v. 2, n. 2, p. 12–24, 2025. DOI: 10.70076/cj.v2i2.134. Disponível em: https://heijournal.id/index.php/cj/article/view/134. Acesso em: 29 may. 2026.