Spad
- 叶绿素仪（计）（soil and plant analyzer development）
- Spad (n.)
- French biplane fighter of World War I, 1917, from French spad, from acronym of Societé pour Aviation et ses Dérivés.
- 1. The SPAD - 502 chlorophyll meter appears promising for rapid , on - farm analysis of crop nitrogen status.
- 叶绿素仪( SPAD -502)的出现使通过无损伤的田间速测对作物进行氮营养诊断成为可能.
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- 2. The inferring ability of SPAD value just slightly surpasses the logarithm - sum model in shooting stage.
- 在抽穗期和灌浆期,对数相加模型的反演能力明显优于SPAD值的反演能力.
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