Table 2.
Source | Sums of squares | d.f. | Mean square | F‐ratio | P‐value |
Main effects | |||||
Site | 0·74 | 1 | 0·74 | 1·51 | 0·22 |
Year | 1·53 | 1 | 1·53 | 3·13 | 0·08 |
Treatment | 89·14 | 3 | 29·71 | 60·93 | 0·00001 |
Interactions | |||||
Site × year | 6·97 | 1 | 6·97 | 14·29 | 0·0002 |
Site × treatment | 6·68 | 3 | 2·22 | 4·57 | 0·0041 |
Year × treatment | 6·56 | 3 | 2·18 | 4·48 | 0·0046 |
Site × year × treatment | 6·05 | 3 | 2·01 | 4·14 | 0·0072 |
Residual | 94·12 | 193 | 0·49 | ||
Total | 264·34 | 208 |