Number of offspring per control vessel in the reproduction test with E. andrei. All tests were performed according to OECD Test Guideline No. 222  in natural soil. The figure shows the mean number of juveniles in the control vessels (containing the natural soil RefeSol 01A) and the standard deviation in tests starting at different times of the year. Results with the same letters are not statistically different.
Schlich et al. Environmental Sciences Europe 2012 24:5 doi:10.1186/2190-4715-24-5