succession cropping造句

• Influence of long residual effect herbicides to succession crop
  长残效除草剂对后茬作物的影响
• Results of succession cropping demonstration of early mature corn changcheng 12 in chilling and humid region of high-elevation of linxia county
  早熟玉米长城12在临夏高寒阴湿区的复种示范结果
• This paper systemically studied the characteristics of physicochemistry environment of the com belt phaeozem in jilin and analyzed the correlation between corn yields with soil physical and chemical conditions . at the same time, the author studied the soil comprehensive assessement system and regulating and controlling technology in the paper . soil samples came from corn succession cropping phaeozem in the central part of jilin
  本文以吉林省中部农区玉米连作黑土为供试土壤，重点研究了吉林玉米带黑土剖面构造及理化环境特征，并在此基础上，对土壤的理化环境指标与玉米产量进行相关分析，初步提出了吉林玉米带黑土土壤环境与玉米产量关系的检索指标体系和土壤调控技术。