I am using the LICOR 6400XT and am getting negative photosynthesis values for some reason. Does anyone know why this would be occurring?

This is with the PAR sensor being set to 1000. The LICOR has been used on multiple plant species and leaf types with the values ranging between -0.7 and -2.2. The plants are located in a humid...

05 July 2018 1,665 8 View