?url_ver=Z39.88-2004&rft_id=doi%3A10.4236%2Fjep.2019.1010079&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Kalifa&rft.au=Traore%2C+Kalifa&rft.aulast=Traore&rft.atitle=Soil+Erosion+Control+and+Moisture+Conservation+Using+Contour+Ridge+Tillage+in+Bougouni+and+Koutiala%2C+Southern+Mali&rft.title=Journal+of+Environmental+Protection+(TSI)&rft.issn=2152-2197&rft.date=October+2019&rft.volume=10&rft.pages=1333-1360&rft.issue=10&rft.genre=article