Effects of Different Planting Densities on the Yield of Hydroponic Brassica campestris
ZHENG Hui-yong,YAN Yu-jie,XU Jing,XIAO Hua-shan
. 2017, (03): 281 -284 .  DOI: 10.3969/j.issn.1009-7791.2017.03.016