Li, Xiangling, Pan Liu, Rui Wang, Yiping Zuo, Jian Wang, Jinling Han, Yuechen Zhang, and Baozhong Yin. 2022. “Effects of Nitrogen Fertilizer on Root-Shoot Characteristics, Grain Yield and Nitrogen Use Efficiency of Different Maize Varieties in North China Plain”. International Journal of Agricultural and Biological Engineering 15 (5):132-40. https://doi.org/10.25165/ijabe.v15i5.6694.