?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=J&rft.au=Nyamangara%2C+J&rft.aulast=Nyamangara&rft.atitle=Effect+of+Conservation+Agriculture+on+Maize+Yield+in+the+Semi-Arid+Areas+of+Zimbabwe&rft.title=Experimental+Agriculture&rft.issn=0014-4797&rft.date=2013&rft.pages=1-19&rft.genre=article