Hajebrahimi, A. ., Nasrollahzadeh, S. ., Shafag-Kolvanagh, J. . and Aghaei-Gharachorlou, P. . (2014) “Effect of nitrogen rates on critical period for weed control and yield of corn (zea mays)”, Scientific Journal of Crop Science, 3(3), pp. 17-23. Available at: http://sjournals.com/index.php/sjcs/article/view/1210 (Accessed: 22July2024).