Acta Agrestia Sinica
The Bottleneck and its Resolutions to the Natural Recovery of Black Soil Type Degraded Grassland in the Three River Source Region
CAO Guang-min, LONG Rui-jun
. 2009, (1): 4 -9 .  DOI: 10.11733/j.issn.1007-0435.2009.01.002