Measuring SPAD
(Relative Chlorophyll) with PhotosynQ

SPAD is a measurement of the leaf’s green coloration and can often be correlated with leaf nitrogen levels due to nitrogen’s prominent place in the green pigment chlorophyll.

Plant photosynthesis is reliant upon this pigment to capture the light energy needed to produce sugars.

Take your own SPAD measurements 

Check out data on Relative Chlorophyll

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Did you know? 

If you've followed us on Social Media, you may have seen our questions regarding relative SPAD in field and greenhouse grown strawberries. Here are the answers to those questions!

Greenhouse grown strawberries have a mean SPAD of 47.05, while field grown strawberries have a mean SPAD of 38.

This is due to the different intensities of light in these environments! With more light in the field, the plant does not have to exert as much effort into producing chlorophyll to capture the available light as the greenhouse grown strawberries. 

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