?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.jenvman.2017.06.017&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Y&rft.au=Xu%2C+Y&rft.aulast=Xu&rft.atitle=Evaluating+the+effect+of+remote+sensing+image+spatial+resolution+on+soil+exchangeable+potassium+prediction+models+in+smallholder+farm+settings&rft.title=Journal+of+Environmental+Management&rft.issn=03014797&rft.date=15+September+2017&rft.volume=200&rft.pages=423-433&rft.genre=article