1.a dangerous incident in railroad travel in which a train passes a red signal
1.The size, angle spad and the brightness of the center of the synchrotron radiation light sources are very important to the users.
同步辐射光源的尺寸、散角和中心亮度是装置的重要参数。
2.Water stress inhibits rice's absorption of nitrogen, thus rice's leaf SPAD value decreases.
水分胁迫抑制了水稻氮素的吸收，从而降低水稻叶片SPAD值。
3.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。
4.In addition, leaf SPAD values were parabolically related with protein and starch accumulation in grains.
叶片SPAD值与籽粒蛋白质和淀粉积累量均呈二次抛物线关系。
5.Object: This paper was proposed to study using SPAD for cotton plant N nutrition diagnosis.
目的：本研究采用SPAD仪进行棉花氮素营养诊断和氮肥推荐。
6.Effect of Nitrogen on SPAD and Photosynthesis Rate of Different Leaves of Winter Wheat at Grain Filling Stage
施氮对灌浆期冬小麦不同叶片SPAD值及光合速率的影响
7.The Relationships between SPAD Readings and the Contents of Chlorophyll and Nitrogen in Strawberry Leaves
草莓叶片叶绿素含量、含氮量与SPAD值间的关系
8.Primary Study on Application of SPAD Value to Estimate Chlorophyll and Nitrogen Content in Wheat Leaves
应用SPAD值预测小麦叶片叶绿素和氮含量的初步研究
9.A Study on Relation between SPAD Value, Chlorophyll and Nitrogen Content in Cotton
SPAD值与棉花叶绿素和含氮量关系的研究
10.SPAD Value of Cotton Leaves on Main Stem and Nitrogen Diagnosis for Cotton Growth
棉花主茎叶SPAD值与氮素营养诊断研究