| Soil | Texture | --------Aqua Regia-------- | ------Water Extraction------ | ||
| Mean (mg·kg−1) | CV (%) | Mean (µg·kg−1) | CV (%) | ||
| Clana Malden Sharkey Kaintuck Wilbur | Sand Sand Clay Sandy loam Silt loam | 0.3 0.2 0.5 Largely undetected 0.4 | 22 41 37 -- 35 | 8 8 34 13 10 | 54 49 20 21 70 |