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.
本文综述了近年来植物外源dna导入技术概况及各种具体的导入实施方法，指出该技术在作物改良上具有一定的潜力。
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。
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.
通过实地调查和文献分析，选择不同的秸秆资源评价指标，对吉林省主要农作物秸秆资源进行了调查和评价。
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