Arsenic extractability and uptake by velvetgrass Holcus lanatus and ryegrass Lolium perenne in variously treated soils polluted by tailing spills

► Velvetgrass proved to be more resistant than ryegrass to the toxicity of soil arsenic. ► Sewage sludge and P addition increased As extractability in soils. ► Sewage sludge had beneficial effect on the growth of velvet, but not on ryegrass. ► Effects of P on plant growth and As uptake were ambiguous. ► Fe addition failed to decrease As solubility or improve plant growth in 3 of 4 soils.