Uptake of Chromium by Portulaca Oleracea from Soil: Effects of Organic Content, pH, and Sulphate Concentration

Table 3

Concentrations of components of the irrigation solutions.

Group #	# of pots	Cr(VI) as Na2CrO4 (ppm)	Sulphate as Na2SO4 (ppm)
1	5	0	0
2	5	200	0
3	5	200	300
4	5	200	600
5	5	200	1200
6	5	200	1800