The test was developed by Viktória Feigl (2005). It is a rapid method that can be used for the estimation of the amount of contaminants (metals) available for plant uptake. For detailed description visit the ecotoxicity tests section of the soil photo gallery on ENFO (White mustard (Sinapis alba) root and shoot growth inhibition test) https://www.enfo.hu/en/node/175 !
Source
Feigl Viktória: Toxikus fémekkel szennyezett talajok stabilizációja - Kísérletek integrált fitoremediációjához, Diploma thesis, BME MGKT, Budapest, 2005.