| Fertilizer types | Rate |
| Red river clay |
| Glenhope loamy sand | ||||
| K | Ca | Mg | K | Ca | Mg | ||||
| mg∙pot−1 | mg∙pot−1 | ||||||||
| CONT | 0 |
| 339.3 | 92.9 | 37.9 |
| 198.8 | 93.0 | 39.0 |
| PMC | 60 |
| 525.6 | 143.3 | 57.9 |
| 244.8 | 139.6 | 67.8 |
| PMC | 120 |
| 538.2 | 156.1 | 63.2 |
| 298.0 | 169.6 | 84.4 |
| PMN | 60 |
| 342.4 | 119.3 | 37.8 |
| 247.5 | 111.8 | 40.9 |
| PMN | 120 |
| 335.4 | 84.6 | 36.0 |
| 253.9 | 114.5 | 38.6 |
| UREA | 60 |
| 422.2 | 124.0 | 51.4 |
| 240.8 | 110.3 | 47.7 |
| UREA | 120 |
| 529.8 | 157.0 | 66.4 |
| 236.0 | 128.8 | 71.0 |
| SE |
|
| 40.24 | 12.25 | 6.10 |
| 17.05 | 9.38 | 6.69 |
| Source effect |
|
|
|
|
|
|
|
|
|
| PMC |
|
| 531.9a | 149.7a | 60.5a |
| 271.4 | 154.6a | 76.1a |
| PMN |
|
| 338.9c | 102.0c | 36.9b |
| 250.7 | 113.2b | 39.8c |
| UREA |
|
| 476.0b | 140.5b | 58.9a |
| 238.4 | 119.6b | 59.4b |
| SE |
|
| 26.90 | 8.16 | 3.34 |
| 17.40 | 7.61 | 4.81 |
| Rate effect |
|
|
|
|
|
|
|
|
|
| 0 |
|
| 339.3b | 92.9b | 37.9b |
| 198.8c | 93.0c | 39.0c |
| 60 |
|
| 430.1a | 128.9a | 49.0a |
| 244.4b | 120.6b | 52.1b |
| 120 |
|
| 467.8a | 132.6a | 55.2a |
| 262.6a | 137.6a | 64.7a |
| SE |
|
| 29.37 | 7.87 | 3.62 |
| 16.20 | 7.57 | 5.17 |
| Model effect |
| d.f. | p value | d.f. | p value | ||||
| N Source |
| 2 | <0.0001 | <0.0001 | <0.0001 | 2 | 0.0569 | <0.0001 | <0.0001 |
| N Rate |
| 2 | 0.0241 | 0.0078 | 0.0198 | 2 | 0.0315 | 0.0022 | 0.0132 |
| Source x Rate |
| 4 | 0.2927 | 0.0091 | 0.2192 | 4 | 0.5863 | 0.4611 | 0.1288 |