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Integrated optical traits (PAR) of Setaria sphacelata, bracken (Pteridium arachnoideum) and bare soil. (Source: field observations with HandySpec)
| Setaria | Bracken | Bare soil | |
|---|---|---|---|
| Reflectance (%) PAR (400 – 700 nm) | 11.7 | 7.4 | 10.7 |
| Transmittance (%) PAR (400 – 700 nm) | 1.5 | 3.7 | − |
| Absorptance (%) PAR (400 – 700 nm) | 86.8 | 88.9 | 89.3 |
