Table 2.
F-values from repeated ANOVA on shoot, root, individual biomass and root/shoot ratios differing in N treatments, date (D) and interaction of N treatment × date (N × D)
| Life history | Species | Source of variation | d.f. | Shoot | Root | Individual | Root/shoot ratio |
|---|---|---|---|---|---|---|---|
| Ephemerals | E. oxyrrhynchum | N | 5 | 39·27 | 36·74 | 39·56 | 8·32 |
| D | 4 | 257·78 | 264·65 | 262·26 | 213·49 | ||
| N × D | 20 | 15·91 | 20·50 | 15·58 | 0·75 | ||
| H. pulchella | N | 5 | 16·73 | 13·95 | 16·75 | 1·72 | |
| D | 4 | 244·98 | 193·01 | 245·01 | 50·75 | ||
| N × D | 20 | 8·17 | 3·96 | 7·99 | 1·04 | ||
| Annuals | C. arenarius | N | 5 | 11·60 | 15·40 | 11·88 | 5·18 |
| D | 5 | 93·04 | 119·72 | 95·35 | 50·35 | ||
| N × D | 25 | 2·48 | 4·51 | 2·56 | 1·69 |
All N and D and N × D were significant at P < 0·01, except N × D for the root/shoot ratio in E. oxyrrhynchum and H. pulchella (P < 0·01).