HAJEBRAHIMI, A. .; NASROLLAHZADEH, S. .; SHAFAG-KOLVANAGH, J. .; AGHAEI-GHARACHORLOU, P. . Effect of nitrogen rates on critical period for weed control and yield of corn (zea mays). Scientific Journal of Crop Science, v. 3, n. 3, p. 17-23, 29 Mar. 2014.