CHOUDHURY, A. T. M. A.; YOUSOP, M. K. A 15N Tracer Study to Evaluate the Effects of Nitrogen and Copper Fertilization on Fertilizer Nitrogen Efficiency in Rice Production: 15N Tracer Study for N and Cu Fertilization in Rice. Biological Sciences - PJSIR, [S. l.], v. 52, n. 1, p. 53–58, 2009. Disponível em: https://v2.pjsir.org/index.php/biological-sciences/article/view/510. Acesso em: 5 may. 2024.