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Chemical characteristics of different water types used for irrigating Calendula officinalis L. plants.
| Irrigation water | EC (dS m−1) | pH | SAR* | Dissolved cations and anions (meq L−1) |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cations |
Anions |
||||||||||
| Ca2+ | Mg2+ | Na+ | K+ | CO32− | HCO3− | Cl− | SO42− | ||||
| TW | 0.74 | 7.0 | 4.0 | 4.0 | 3.0 | 7.0 | 0.3 | – | 0.9 | 8.0 | 2.1 |
| MW | 3.7 | 7.2 | 7.2 | 5.0 | 3.8 | 21.6 | 3.8 | – | 1.3 | 28.0 | 2.8 |
| WW | 4.0 | 7.9 | 7.4 | 5.1 | 3.6 | 22.1 | 3.6 | – | 0.9 | 28.0 | 5.0 |
Sodium adsorption ratio.
