?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=J+W&rft.au=Onyango%2C+J+W&rft.aulast=Onyango&rft.date=2013&rft.title=Critical+analysis+of+tillage+practices+with+fertility+levels+in+maize+and+populations+in+beans+as+adaptation+measures+to+climate+change+to+enhance+food+security+at+Kabete&rft.genre=proceeding