主题：【求助】(ok)帮忙找2篇文献！

【序号】：1
【作者】：Edward Johnston, Paul R. Poulton and Kevin Coleman
【题名】：Chapter 1 Soil Organic Matter: Its Importance in Sustainable Agriculture and Carbon Dioxide Fluxes
【期刊】：Advances in Agronomy
【年、卷、期】：Volume 101, 2009, Pages 1-57
【全文链接】：http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B7CSX-4VR1NPH-5&_user=1489329&_coverDate=12%2F31%2F2009&_alid=887073825&_rdoc=48&_fmt=high&_orig=search&_cdi=18034&_sort=d&_st=4&_docanchor=&_ct=746&_acct=C000053059&_version=1&_urlVersion=0&_userid=1489329&md5=46ac2b71084cd82f416769ab7324a45e

【序号】：2
【作者】：R. Lal
【题名】：The potential of soils of the tropics to sequester carbon and mitigate the greenhouse effect
【期刊】：Advances in Agronomy
【年、卷、期】：Volume 76, 2002, Pages 1-30 
【全文链接】：http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B7CSX-4B34Y18-2&_user=1489329&_coverDate=12%2F31%2F2002&_alid=887073825&_rdoc=559&_fmt=high&_orig=search&_cdi=18034&_st=4&_docanchor=&view=c&_ct=746&_acct=C000053059&_version=1&_urlVersion=0&_userid=1489329&md5=3418311514fa226c30c9e49681d962bb

多谢！