| Treatments | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | Cumulative 8-yr |
| Precipitation (mm) | |||||||||
| 730 | 671 | 1001 | 789 | 890 | 764 | 631 | 706 | 6182 | |
| % of 40-yr average | |||||||||
| 90 | 83 | 123 | 98 | 110 | 94 | 78 | 87 | 96 | |
| Drainage (mm) | |||||||||
| NT | 263 ab‡ | 270† | 422 ab | 239 ab | 297 | 293 ab | 226 | 256 | 2266 ab |
| CP | 353 b | 410 | 590 b | 329 b | 500 | 463 a | 300 | 245 | 3190 b |
| PR | 113 a | 83 | 204 a | 99 a | 117 | 162 b | 92 | 108 | 978 a |
| LSD(0.05) | 190 | 296 | 266 | 138 | 585 | 279 | 217 | 167 | 1758 |
| Nitrate leaching loss (kg N ha−1) | |||||||||
| NT | 63 | 32 ab | 102 | 6 | 24 ab | 15 | 9 | 26 | 277 a |
| CP | 62 | 35 b | 76 | 9 | 57 b | 25 | 11 | 29 | 303 a |
| PR | 0.12 | 0.07 a | <0.01 | <0.01 | 0.03 a | 0.02 | 0.07 | 0.12 | 0.43 b |
| LSD(0.05) | 66 | 32 | 174 | 14 | 34 | 50 | 17 | 36 | 213 |
| Flow-weighted mean nitrate concentration (mg N L−1) | |||||||||
| NT | 23.8 a | 11.7a | 24.2 | 2.5 | 8.0 | 10.9 a | 4.9 | 10.2 | 12.2 a |
| CP | 18.1 ab | 8.4 b | 12.6 | 2.5 | 14.0 | 7.6 ab | 3.6 | 11.8 | 9.5 a |
| PR | 0.11b | 0.08 c | <0.01 | <0.01 | 0.02 | 0.01b | 0.08 | 0.11 | 0.04 b |
| LSD(0.05) | 19.5 | 1.4 | 38.7 | 4.1 | 22.9 | 8.5 | 4.8 | 12.3 | 4.4 |