【摘要】 本系统是为玉米高产、稳产栽培试验研究而编制的。作者着重介绍数据库管理系统与应用程序包之间交互作用,数据库的条件检索方法以及整个系统的结构和功能。研究过程中证实,使用本系统大大提高了工作效率。更多还原

【Abstract】 The system is developed for experiments and studies to gain high and stable yields in the cultivation of corn. In this paper the interaction of the data base management system with the program package, the conditional retrieving methods of data, and the structure and functions of the whole system are presented Using this system in our research work has enhanced the efficiency remarkably.更多还原