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Toxicity to terrestrial plants:

EC50 values for barley root length were in the range of 505.93 to 3486.6 mg VAA/kg (added V).

EC50 values for barley shoot growth were in the range of 369.19 to 1572.49 mg VAA/kg (added V).

EC50 values for tomato shoot growth were in the range of 123.06 to 1230.60 mg VAA/kg (added V).

EC10 values: Barley root length: 164.09 to 1709.23 mg VAA/kg; barley shoot growth: 95 .72 to 670.02 mg VAA/kg; tomato shoot growth 75.206 to 752.06 mg VAA/kg (all values based on added V).

Toxicity to soil microorganisms:

Assay of potential nitrification rate: EC50: 191.43 to 4717.46 mg VAA/kg soil.

Assay of substrate-induced respiration: EC50: 1367.38 to 3965.40 mg VAA/kg soil.

The potential nitrification rate EC10 values were all in the range of the vanadium background concentrations with the exception of the Saby soil.

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