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

Table 1

Soil composition with different organic contents.

Organic content (%)	Soil composition
	Potting soil (70% organic matter content) (%)	Ajman soil (contains 42% CaCO3) (%)
35 ± 0.5	50	50
17.5 ± 0.5	25	75
0.42 ± 0.02	—	100