%0 Journal Article %T Modification of a gas exchange system to measure active and passive chlorophyll fluorescence simultaneously under field conditions %A Meeker, Eliot, W %A Magney, Troy, S %A Bambach,, Nicolas %A Momayyezi,, Mina %A McElrone, Andrew, J %J AoB Plants %V 13 %N 1 %D 2021-02-01 %I Oxford University Press %~ DeepDyve