This paper summarized the survey in studies of techniques for introducing exogenous DNA into plants and various methods of introduction. This technique has definite potentiality in crop improvement.
The affection is discussed based on the survey data of crop fertilization in farmer households.
根据农户作物施肥的调查数据，讨论种植结构对化肥消费状况的影响。
3
Based on data analysis and field survey, the study chooses various evaluating indices to finish the research and evaluation on main crop straw in Jilin province.