Crop rotations and, therefore, field selection containing controllable weeds must be achieved before planting.
Many growers use a stale seedbed technique followed by cultivation, except in excessively wet years.
Row spacings that enhance canopy development and cultivation are sometimes supplemented with a herbicide that selectively controls weeds within the crop row. In eastern Oregon, rye windbreaks often are planted between rows and incorporated during the last cultivation. Sometimes the first flush of weeds must be controlled with cultivation before herbicide begins to control grass. Consult label for planting sensitive crops following treatment. Do not apply more than once every 12 months.