| Forage Crop × Cut 1 Date Interaction Effects | ||||
| Time of first harvest | ADF | CP | TDN | |
| Alfalfa | Late June | 369a | 174a | 592a |
| Early July | 388a | 152b | 571a | |
| Late July | 385a | 122cd | 575a | |
| Late August | 378a | 107de | 582a | |
| Bromegrass | Late June | 395a | 126c | 564a |
| Early July | 388a | 103e | 572a | |
| Late July | 401a | 55f | 558a | |
| Late August | 387a | 52f | 573a | |
| Alfalfa + Bromegrass | Late June | 378a | 142b | 582a |
| Early July | 376a | 121cd | 585a | |
| Late July | 390a | 95e | 570a | |
| Late August | 380a | 102e | 580a | |
| P values | 0.0771 | 0.0128 | 0.0765 | |
| SEM | 6.2 | 5.7 | 6.6 | |
| Forage Crop Means | ||||
| Crop |
| ADF | CP | TDN |
| Alfalfa |
| 380b | 139a | 580a |
| Bromegrass |
| 393a | 84c | 567b |
| Alfalfa + Bromegrass |
| 381b | 115b | 579a |
| P values |
| 0.0001 | <0.0001 | 0.0001 |
| SEM |
| 4.7 | 2.8 | 5.0 |
| Cut 1 Date Means | ||||
| Cut date |
| ADF | CP | TDN |
| Late June |
| 381b | 147a | 579a |
| Early July |
| 384b | 125b | 576a |
| Late July |
| 392a | 91c | 568b |
| Late August |
| 382b | 87c | 578a |
| P values |
| 0.0135 | <0.0001 | 0.0134 |
| SEM |
| 4.8 | 3.2 | 5.2 |
| Fertility Means | ||||
| Fertility |
| ADF | CP | TDN |
| Unfertilized |
| 382a | 109b | 578a |
| Fertilized |
| 387a | 116a | 573a |
| P values |
| 0.0515 | 0.0261 | 0.0516 |
| SEM |
| 4.5 | 2.2 | 4.8 |