Research Article
Improving Lowland Rice (O. sativa L. cv. MR219) Plant Growth Variables, Nutrients Uptake, and Nutrients Recovery Using Crude Humic Substances
Table 1
Selected chemical properties of Typic Paleudults (Bekenu Series) soil before incubation and pot study.
| Property | Current study | Standard data range* (0–36 cm) |
| | 4.41 | 4.6–4.9 | Bulk density (g cm−3) | 1.16 | NA | TOC (%) | 1.43 | 0.57–2.51 | Total N (%) | 0.08 | 0.04–0.17 | Exchangeable (mg kg−1) | 21.02 | NA | Available (mg kg−1) | 7.01 | NA | Available P (mg kg−1) | 4.85 | NA |
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(Cmol (+) kg−1) | CEC | 11.97 | 3.86–8.46 | Exchangeable K+ | 0.10 | 0.05–0.19 | Exchangeable Ca2+ | 0.25 | NA | Exchangeable Mg2+ | 0.34 | NA | Exchangeable Na+ | 0.22 | NA | Exchangeable Fe2+ | 0.19 | NA | Exchangeable Cu2+ | Trace | NA | Exchangeable Zn2+ | 0.01 | NA | Exchangeable Mn2+ | 0.02 | NA | Total titratable acidity | 0.86 | NA | Exchangeable H+ | 0.64 | NA | Exchangeable Al3+ | 0.22 | NA |
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NA: not available; *Paramanathan [34].
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