示范试验 meaning in English

demonstration test
demonstrative experiment
tryout

This paper will not deal directly with these research works , but rather will focus on using yield data from several sources including research and demonstration trials , myr results , as well as data collected by survey , to indicate annual production and economic potentials ( or lost opportunities for china by not adopting certain practices or components of myr already tested )
本文不准备直接讨论这些研究工作，而将注意力集中在利用研究和示范试验、最高产量研究结果和普查资料等方面已有的产量数据，说明年度产量和经济潜力（即不采用最高产量研究已试验过的某些措施和配套技术时中国将失去的机会）。