Arsenic and Lead Uptake by Vegetable Crops Grown on Historically Contaminated Orchard Soils

Table 2

Linear regression slopes and 𝑟-values (in parentheses) for correlations between vegetable Pb and As concentrations (mg kg⁻¹) and soil soluble (mg L⁻¹) and total Pb and As (mg kg⁻¹). 𝑟-values denoted with asterisks are significant at the 5% level.

Crop	Metal	Soil parameter tested
		Soluble metal	Total metal
Lettuce	Pb	3.08 (0.805)	0.000769 (0.970*)
	As	6.53 (0.998*)	0.0288 (0.939*)
Carrot (unpeeled)	Pb	12.4 (0.717)	0.00177 (0.943*)
	As	1.59 (0.997*)	0.00609 (0.955*)
Bean (pods)	Pb	1.16 (0.346)	7.70×10^−5 (0.521)
	As	5.85 (0.991*)	0.0213 (0.918*)
Tomato (fruit)	Pb	0.516 (0.851*)	8.91×10^−5 (0.977*)
	As	0.0073 (0.942*)	2.80×10^−5 (0.908*)