Chapter 3 (2)Photosynthetically Active Radiation(PAr) Radiation distribution in plant canopies Measurement of PAR in canopies 2021/2/22 Assessment of Climate/Change Impacts 29of76Chapter 3 2021/2/22 Assessment of Climate/Change Impacts 29 of 76 • Radiation distribution in plant canopies • Measurement of PAR in canopies (2) Photosynthetically Active Radiation(PAR)