| Treatment | A | gs | Ci | E | WUE | Ci/Ca | A/gs | |||||||
| DAP | ||||||||||||||
| 42 | 47 | 42 | 47 | 42 | 47 | 42 | 47 | 42 | 47 | 42 | 47 | 42 | 47 | |
| CO2 level (A) | ** | ** | *** | *** | ** | NS | *** | *** | *** | * | *** | NS | *** | NS |
| Soil moisture (B) | * | ** | NS | NS | NS | NS | NS | * | NS | NS | NS | NS | NS | NS |
| AXB | * | * | NS | NS | NS | NS | NS | NS | * | NS | NS | NS | NS | NS |