Research Article
Effect of Phosphogypsum Amendment on Chemical Properties of Sodic Soils at Different Incubation Periods
Table 1
Chemical analysis of soil (0–20 cm depth), irrigation water, and PG used in the study.
| | Items | Units | Soil | Irrigation water | Phosphogypsum |
| | Sand | % | 46.67 | — | — | | Silt | % | 20.33 | — | — | | Clay | % | 33.00 | — | — | | Texture | — | Loam | — | — | | Bd | g·cm−3 | 0.92 | — | — | | OM | % | 4.44 | — | — | | pH | — | 9.94 | 7.80 | 2.26 | | EC | dSm−1 | 0.33 | 0.17 | 8.30 | | Avai. P | mg·kg−1 | 0.12 | — | 105.04 | | Excha. Na | cmolc·kg−1 | 28.88 | — | 1.47 | | Excha. K | cmolc·kg−1 | 1.48 | — | 2.99 | | Excha. Ca | cmolc·kg−1 | 22.01 | — | 140.49 | | Excha. Mg | cmolc·kg−1 | 1.00 | — | 1.01 | | CEC | cmolc·kg−1 | 42.00 | | | | ESP | % | 68.75 | — | — | | Fe | mg·kg−1 | 5.02 | — | 7.10 | | Zn | mg·kg−1 | 0.29 | — | 0.11 | | Mn | mg·kg−1 | 0.69 | — | 0.94 | | Cu | mg·kg−1 | 3.00 | — | 0.04 | | Na | mg·kg−1 | — | 0.75 | — | | K | mg·kg−1 | — | 0.17 | — | | Ca | mg·kg−1 | — | 1.00 | — | | Mg | mg·kg−1 | — | 1.22 | — | | SAR | — | — | 0.71 | — | | SO4−2 | meq L−1, PG/mg·kg−1 | 6.08 | 0.04 | 1856.14 | | PO4−3 | meq L−1 | — | 2.00 | — | | Cl− | meq L−1 | 17.51 | 0.28 | — | | HCO3− | meq L−1 | 100.39 | 2.00 | — | | CO3−2 | meq L−1 | 25.13 | — | — | | RSC | meq L−1 | — | −0.22 | — |
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Excha = exchangeable; SAR = sodium adsorption ratio; Bd = bulk density; ECw = electrical conductivity of water; RSC = residual sodium carbonate; ESP = exchangeable sodium percentage.
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