A Study on the Index of Nitrogenous Fertilizer Application and Nitrogen Balance for High Yield in Seashore Rice Region of Hebei by Using 15N
Chen Liang, Gao Zhanfeng, Zeng Yanjun, Xu Xiaorong
ACTA AGRICULTURAE BOREALI-SINICA . 1989, (S1): 195 -201 .  DOI: 10.3321/j.issn:1000-7091.1989.z1.035