Acta Agrestia Sinica
Effects of Returning Cultivated land to Grassland on Soil Chemical Properties in the Agro-pastoral Transitional Zone of Northern China
GUO Yan-jun, HAN Jian-guo
. 2008, (4): 386 -391 .  DOI: 10.11733/j.issn.1007-0435.2008.04.013