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Productivity and Economics of Sorghum Varieties for Grain as Influenced by Nitrogen Levels in Sandy Loam Soil. International Journal of Natural Sciences Research, [S. l.], v. 2, n. 1, p. 5–11, 2014. Disponível em: https://archive.conscientiabeam.com/index.php/63/article/view/2310. Acesso em: 5 aug. 2026.