Effects of Nitrogen Application Time on Carbon Assimilate and Nitrogen Translocation and Nitrogen Use Efficiency of Summer Maize
XIA Lai kun, TAo Hong bin, ZHU Jin cheng, XU Jie, WANG Pu
ACTA AGRICULTURAE BOREALI-SINICA . 2009, (3): 208 -211 .  DOI: 10.7668/hbnxb.2009.03.043