?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Ringo%2C+J&rft.aufirst=J&rft.aulast=Ringo&rft.issn=1835-2707&rft.pages=9-13&rft.atitle=Heterosis+for+yield+and+its+components+in+sorghum+(Sorghum+bicolor+L.+Moench)+hybrids+in+dry+lands+and+sub-humid+environments+of+East+Africa&rft.volume=9&rft.issue=1&rft.title=Australian+Journal+of+Crop+Science&rft.date=2015&rft.genre=article