Research Article
Improving Ammonium and Nitrate Release from Urea Using Clinoptilolite Zeolite and Compost Produced from Agricultural Wastes
Table 1
Selected chemical properties of Bekenu Series.
| Property | Value obtained | Standard data range | (mean ± SE) |
| CEC (cmolc kg−1) | 7.43 (±0.15) | 8.0–24 | pHwater | 4.66 (±0.10) | 4.60 | Exchangeable calcium (cmolc kg−1) | 1.41 (±0.05) | 0.01 | Exchangeable magnesium (cmolc kg−1) | 1.53 (±0.05) | 0.21 | Exchangeable potassium (cmolc kg−1) | 0.60 (±0.02) | 0.19 | Total nitrogen (%) | 0.15 (±0.01) | 0.04–0.17 | Organic matter (%) | 2.06 (±0.10) | nd | Total carbon (%) | 1.20 (±0.60) | 0.57–2.51 | Available phosphorus (mg kg−1) | 4.16 (±0.13) | nd | Exchangeable ammonium (mg kg−1) | 19.85 (±0.68) | nd | Available nitrate (mg kg−1) | 5.16 (±0.09) | nd |
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Note. Standard data range reported by Paramananthan [24]; nd = not determined. Values in parenthesis represent standard error of the mean.
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