AL–Gebori , Mohammed SH., and Inaam F. AL – Zuhairi. “ Allelopathy Effects for (Secale Cereale L.) and (Brassicai Nigra L.)in : 1-Inhibition of Rhizobium Growth and Nodulation of (Vica Faba L.) ”. Diyala Agricultural Sciences Journal , vol. 1, no. 2, Dec. 2009, pp. 1-5, https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/3162.