Poor functioning spreaders leave some areas covered and some bare.
Cereal straw management is especially important on fields planned for canola next year, given the impact uneven residue can have on seed placement and seedling survival. Cutting as high as you can and making sure the combine spread width matches the header width are important steps at harvest. Have someone check the spread pattern behind the combine. Sometimes just adjusting the spreader vanes is enough to improve results.
Source: Alberta Canola Producers Commission