A Study on Nitrogen Fertilizer Application Recommendation to Winter Wheat Using Index of NO-3~- Concentration in Stem of Wheat
Zhao Tongke, Cao Yunzhe, Zhang Guoyin, Li Guangmin
ACTA AGRICULTURAE BOREALI-SINICA . 1999, (S1): 131 -134 .  DOI: 10.7668/hbnxb.1999.S1.028