Transitioning land from perennial forages to annual crops is best done with herbicide applications the fall before. Brome and fescue can be hard to kill, and growers will be fighting these plants all season if they weren’t first sprayed last fall.
Tillage may do a better job of removing these weeds, but numerous passes may be necessary once tillage is initiated. Fall and pre-seed herbicide with direct seeding is often more effective.
Further reading:
Canola not the best for fresh broken pasture
Direct seeding into sod — tips