丁于:北京市农业学校高级讲师,《北京中专教育》主编。多年来为本刊提供了大量信息。66岁的丁于同志工作深入,本刊第四期“读者信箱”栏目中发表的《呼吁重视农业技术人才的学历贬值与流失》一文,就是他在深入调查研究的基础上撰写的,内容详实、观点鲜明,获得了广大读者的肯定。 Ding Yu: Beijing Agricultural School senior lecturer, “Beijing secondary education editor.” Over the years to provide a large number of information. 66-year-old comrade Ding in-depth work, the fourth issue of “Reader’s Mailbox” column published in the “call for the devaluation and loss of academic qualifications of agricultural technology professionals,” is his article based on in-depth investigations and studies, Detailed content, distinctive point of view, won the majority of readers.