| Season | Model | R2 | Significant Level |
| Summer | RGA = −56.65 − 0.23 P‡ + 427.41 Iα + 4.24Ɵγ | 0.76 | 5% |
| Fall | RGA = −243.04 + 7.16 I − 0.079 APβ + 25.22Ɵ | 0.92 | 10% |
| Spring | RGA = 14.62 + 2.18 P | 0.99 | 5% |
| RGA = 17.03 + 0.07 D± | 0.99 | 5% |