Research Article
Fertility Evaluation of Limed Brazilian Soil Polluted with Scrap Metal Residue
Table 4
Dry matter yield, element concentration, and adequate nutritional range for corn grown in the soil mixtures studied.
| Attributes | Proportion of contaminated soil (%) | | Equation | Regression coefficienta | 0 | 25 | 50 | 75 | 100 | Adequate range | |
| Dry matter (g pot−1) | | | | | | | — | NS | N (g kg−1) | | | | | | 27–35b | | 0.27* | P (g kg−1) | | | | | | 2.0–4.0b | | 0.28* | K (g kg−1) | | | | | | 17–35b | | 0.73* | Ca (g kg−1) | | | | | | 2.5–8.0b | | 0.48* | Mg (g kg−1) | | | | | | 1.5–5.0b | | 0.76* | S (g kg−1) | | | | | | 1.5–3.0b | | 0.75* | B (mg kg−1) | | | | | | 10–25b | | 0.91* | Cu (mg kg−1) | | | | | | 6–20b | | 0.51* | Fe (mg kg−1) | | | | | | 30–250b | — | NS | Mn (mg kg−1) | | | | | | 20–200b | | 0.77* | Zn (mg kg−1) | | | | | | 15–100b | | 0.81* | Cd (mg kg−1) | | | | | | 0.1c | — | NS | Cr (mg kg−1) | | | | | | 0.20c | — | NS | Ni (mg kg−1) | | | | | | 0.19c | — | NS | Pb (mg kg−1) | | | | | | 0.02c | | 0.30* |
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Significant at (*) and not significant (NS).
bvan Raij et al. [34].
cU. C. Gupta and S. C. Gupta [35].
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