Taheri,M , , Bayat,F , , Moghaddam,H , and Majnoon-Hosseini,N . "Study the effect of vetch (Vicia pannonica) as a first season sowing and green manure along with nitrogen fertilizer levels on forage maize yield", Iranian Journal of Field Crop Science, 48, 1, 2017, 1-9. doi: 10.22059/ijfcs.2017.139259.654005