Effect of plough pans on the growth of soybean roots in the black- soil region of northeastern China
DONG Wen-cai, FU Qiang, WANG Quan-jiu, CAO Cheng-peng
Journal of Integrative Agriculture . 2017, (10): 2191 -2196 .  DOI: 10.1016/S2095-3119(16)61567-8