Welcome to Chinese Agricultural Science Bulletin,
Diagnostic Technique of Sugarbeet Nitrogen Nutrient Status Using SPAD-502 Chlorophyll Meter
Wang Qiuhong,Zhou Jianchao and Wang Xiaochun
Chinese Agricultural Science Bulletin . 2015, (36): 92 -98 .  DOI: 10.11924/j.issn.1000-6850.casb15090014