Chapter 3 Measurement of par bottom of the canopy 17 1 PAR 2 Sunfleck 3 Auto PAR 4 Auto Sunfleck rea m 5 Continuous 7 Threshold or Single Senso 8 Erase or Send erase send 2021/2/22 Assessment of Climate/Change Impacts 33of76Chapter 3 2021/2/22 Assessment of Climate/Change Impacts 33 of 76 Measurement of PAR —bottom of the canopy