?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=J&rft.au=Nyamangara%2C+J&rft.aulast=Nyamangara&rft.date=October+2013&rft.title=Grain+yield+of+selected+crops+at+four+climate+analogue+locations+in+Zimbabwe&rft.genre=proceeding