?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Nuria&rft.aulast=Santana+Vega&rft.au=Santana+Vega%2C+Nuria&rft.title=Tierras+de+Castilla+y+Le%C3%B3n%3A+Agricultura&rft.atitle=La+importancia+del+suelo+en+la+producci%C3%B3n+agr%C3%ADcola&rft.date=September+2015&rft.issn=1889-0776&rft.pages=16-25&rft.issue=231&rft.genre=article