?url_ver=Z39.88-2004&rft_id=10.3923%2Faj.2013.204.211&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=M&rft.au=Mativavarira%2C+M&rft.aulast=Mativavarira&rft.atitle=Response+of+Sorghum+Cultivar%E2%80%99s+to+Nitrogen+Levels+on+Yield%2C+Water+Productivity%2C+Stover+Nutritive+Value+Traits+and+Economic+Benefits+to+Crop-Livestock+Farmers+in+the+Semi-Arid+Areas+of+Zimbabwe&rft.title=Agricultural+Journal&rft.issn=1816-9155&rft.date=2013&rft.volume=8&rft.pages=204-211&rft.issue=5&rft.genre=article