| Water type | Soil series | Fertilizer-P source‡ | BG P†,‡ (mg·cm−2) | Total Mg†,‡ (mg·cm−2) |
| Tap water | Creldon | CPST | 6.45e | 0.57fgh |
| MAP | 11.14abc | 0.72bc | ||
| ECSTreal | 10.43abc | 0.74b | ||
| ECSTsyn | 11.25abc | 0.95a | ||
| UC | 5.97e | 0.39i | ||
| Calloway | CPST | 13.00a | 0.67b-e | |
| MAP | 10.84abc | 0.65b-f | ||
| ECSTreal | 10.55abc | 0.68bcd | ||
| ECSTsyn | 12.14ab | 0.90a | ||
| UC | 9.60bc | 0.51h | ||
| Wastewater | Creldon | CPST | 8.96cd | 0.64c-f |
| MAP | 6.94de | 0.59e-h | ||
| ECSTreal | 9.38bc | 0.71bc | ||
| ECSTsyn | 9.51bc | 0.91a | ||
| UC | 5.49e | 0.37i | ||
| Calloway | CPST | 10.15abc | 0.56fgh | |
| MAP | 9.94bc | 0.55gh | ||
| ECSTreal | 11.26abc | 0.71bcd | ||
| ECSTsyn | 11.21abc | 0.87a | ||
| UC | 12.01ab | 0.61deg |