?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=S+S&rft.au=Snapp%2C+S+S&rft.aulast=Snapp&rft.atitle=Sustainable+soil+management+options+for+Malawi%3A+can+smallholder+farmers+grow+more+legumes%3F&rft.title=Agriculture%2C+Ecosystems+and+Environment&rft.date=2002&rft.volume=91&rft.pages=159-174&rft.issue=1-3&rft.genre=article