Photosythetically active radiation (400-700 nm), no weighting applied.

PAR(std = "Plant")

Arguments

std

a character string "Plant" or "McCree"

Value

a waveband object wavelength defining a wavelength range.

References

McCree, K. J. (1972) The action spectrum, absorptance and quantum yield of photosynthesis in crop plants. Agricultural Meteorology, 9, 191-216

See also

Examples

PAR()
#> PAR #> low (nm) 400 #> high (nm) 700 #> weighted none
PAR("Plant")
#> PAR #> low (nm) 400 #> high (nm) 700 #> weighted none