| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Zizyphus spina-christi | Fruit | 3140.0 | 3460.0 | -0.3 | * |
| Zizyphus jujuba | Fruit | 590.0 | 3550.0 | -0.2 | * |
| Zingiber officinale | Rhizome | 690.0 | 3764.0 | 1.0 | * |
| Zingiber officinale | Root | 690.0 | 3764.0 | 0.9 | USDA's Ag Handbook 8 and sequelae) |
| Zea mays | Silk Stigma Style | -- | 3690.0 | * | |
| Yucca baccata | Root | -- | 2820.0 | -1.2 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Xanthosoma sagittifolium | Root | 1320.0 | 3870.0 | 1.1 | * |
| Xanthosoma sagittifolium | Leaf | 34.0 | 3370.0 | 0.6 | * |
| Vitellaria paradoxa | Seed | -- | 6220.0 | 1.1 | * |
| Vigna unguiculata | Shoot | 290.0 | 2837.0 | 0.0 | * |
| Vigna unguiculata | Shoot | 290.0 | 2837.0 | 0.0 | USDA's Ag Handbook 8 and sequelae) |
| Vigna unguiculata | Fruit | 470.0 | 3868.0 | 0.3 | USDA's Ag Handbook 8 and sequelae) |
| Vigna radiata | Seed | 3340.0 | 3815.0 | -0.8 | USDA's Ag Handbook 8 and sequelae) |
| Vigna aconitifolia | Seed | 3430.0 | 3798.0 | -0.8 | * |
| Vigna unguiculata | Seed | 1270.0 | 3825.0 | -0.8 | USDA's Ag Handbook 8 and sequelae) |
| Vigna subterranea | Seed | 1520.0 | 4120.0 | -0.6 | * |
| Vigna mungo | Seed | 3340.0 | 3890.0 | -0.8 | * |
| Vigna unguiculata | Seed | 3470.0 | 3789.0 | -0.8 | USDA's Ag Handbook 8 and sequelae) |
| Vigna radiata | Sprout Seedling | -- | 3151.0 | -0.5 | USDA's Ag Handbook 8 and sequelae) |
| Vigna angularis | Seed | 3290.0 | 3800.0 | -0.8 | * |