Using the tool of Visual Basic 6.0, design and impolder the estimate and analysis system of different levels potential yield (EAS) with the idea of descending different levels potential yield and increasing production approach.

• 在此基础上，以Visual Basic 6.；0为开发工具，按照逐层递减方去估算并分析单项作物和主要种植模式各层次生产潜力，并据此提出相应增产途径的基本思路，开发出层次生产潜力估算与分析系统(EAS系统)。