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Mean root length density (RLD) and specific root length (SRL) (± s.e.) for the 80-2 and 900-4 families at 50–100 and 400–500 mm depths. Measurements were made at harvest 3 (170 d after sowing)
| Depth (mm) | 80-2 | 900-4 | P value | |
|---|---|---|---|---|
| RLD (km m−3) | 50–100 | 41·04 ± 8·526 | 16·09 ± 8·088 | 0·049 |
| 400–500 | 0·48 ± 0·125 | 0·54 ± 0·119 | 0·696 | |
| SRL (m g−1) | 50–100 | 155·5 ± 8·10 | 108·4 ± 7·68 | 0·001 |
| 400–500 | 105·6 ± 15·52 | 99·2 ± 14·72 | 0·767 |
