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本文对１９９１－１９９３年《四川农业大学学报》和《西北农业大学学报》刊载的５７５ 篇论文的４４２１条引文进行统计分析，结果表明：高等农业院校的教学科研人员 在教学科研中能注意利用现有文献；需求情报主要来自中文和英文科技期刊论 文；中外文农业文献的半衰期分别为６年和１２年．
In this paper, statistical analysis is made on 4421 citations of 575 papers published in Journal of Sichuan Agricultural University and Journal of Northwest Agricultural University from 1991 to 1993. The results show that teaching and research personnel in higher agricultural colleges can pay attention to teaching and research Existing literature; Demand intelligence mainly from Chinese and English scientific journals Papers; Chinese and foreign literature on the half-life of the household were 6 years and 12 years.