Prepare N pieces of the basic same paper, stopwatch, meter scale, etc. (See the picture below).
完整平整的基本相同纸n张、秒表、米尺等(见下图)。
Then the output S/N is calibrated DA with the dynamic signal analizer and power meter.
并用动态信号分析仪和功率计校准输出信噪比。
Therefore, the objective of theis study was to evaluate these three different chlorophyll meter-based approaches for diagnosing N status of summer maize.
因而，这次研讨的主要目的就是，经过三种不同的办法运用叶绿素丈量仪就夏天玉米的含氮量停止研讨。
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