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THAA concentration and soil and AA N transfer from clover to grass and grass to clover. Values are mean ± SE (n = 4)
| N transfer direction | Treatment | Soil N transfer / % | TraC | RecC | TraC | RecC |
|---|---|---|---|---|---|---|
| THAA concentration / mg g−1 soil | AA N transfer / % | |||||
| Clover to grass | Control | - | 8.9 ± 2.3 | 11.8 ± 1.1 | - | - |
| 15N-urea | 0.083 ± 0.011 | 11.4 ± 0.4 | 13.1 ± 1.3 | 0.17 ± 0.09 | - | |
| Grass to clover | Control | - | 10.0 ± 0.6 | 12.2 ± 0.7 | - | - |
| 15N-urea | 0.17 ± 0.06 | 11.7 ± 2.0 | 13.8 ± 1.2 | 0.13 ± 0.03 | 0.15 ± 0.09 | |
