Crops with similar N status and canopy cover can be grouped together.
Table 1: Grouping Options for forages.
| CROP | GROUPING CATEGORY | COMMENTS |
| Annual Ryegrass | Grass forage | |
| Forage barley (spring) | Spring cereal forage | The cereal forages can be grouped on Spring and Autumn sown types. |
| Forage oats (spring) | Spring cereal forage | |
| Rye corn (spring) | Spring cereal forage | |
| Triticale (spring) | Spring cereal forage | |
| Rye corn (autumn) | Autumn cereal forage | |
| Forage oats (autumn) | Autumn cereal forage | |
| Triticale (autumn) | Autumn cereal forage | |
| Maize silage | Maize | If appropriate harvest time is given maize silage is no different to grain maize. |