NYC Urban Tree Health Equipment Comparison


Examining the influence of salt stress on tree health in New York city, and how measurements compare among different machines. 


Chlorophyll content (SPAD) III

REQUIREMENTS: Firmware v0.41 or higher. Measures transmission at 940nm and 650nm in order to determine the 'greenness' of a leaf, an indicator of chlorophyll content and nitrogen content. The 940 is used to account for leaf thickness. Improvements over Chlorophyll content (SPAD): - performs 3 different spads at 3 intensities for thin and thick ...


  1. Have the leaves been dark adapting for at least 30 minutes but no more than 3 hours? (Multiple Choice)
  2. (Multiple Choice)
  3. (Multiple Choice)


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