Table 4.

The effect of different concentrations of SO2 on the foliar uptake of SO2 by four woody plants.*

OS2 Concn (PPm)SO2 uptake (mg/hr/g)
BirchAshFirethornAzalea
1.00.268a0.115a0.222a0.071a
0.50.260a0.109a0.218a0.069a
0.20.214b0.112a0.178b0.077a
  • *Mean separation in columns by Duncan’s multiple range test, 5% level. (From: Roberts, B.R. 1974. Foliar sorption of atmospheric sulfur dioxide by woody plants. Environ. Pollut. 7:133-140).