SOIL ORGANIC CARBON AND CROP YIELDS IN CHINA

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B82XG-4W4TVWV-D&_user=10&_coverDate=04%2F30%2F2009&_rdoc=12&_fmt=high&_orig=browse&_srch=doc-info(%23toc%2333030%232009%23999919995%231072115%23FLP%23display%23Volume)&_cdi=33030&_sort=d&_docanchor=&_ct=19&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=6e08ddb24b23dc53fca08f1ae69fee41