I have experimented with putting some triflurilan on with my Bee Line when I'm seeding canola with varying results. Usually it is necessary to do some spot spraying, but the cereal crops that follow the next year will rarely need any wild oat chemical and the triflurilan has virtually eliminated wild millet, russian thistle and wild buckwheat. While getting good control of some weeds like quackgrass, direct seeding has resulted in some new weeds to battle. Narrow leafed hawksbeard, dandelion and old foes like Canada thistle and sow thistle have become formidable foes. I try to do my own spraying to save some money, but some years a pre harvest application of glyphosate is required on some fields.
More time is required for crop checking and studying what chemicals to use for what weeds.
Soil quality has improved as a result of direct seeding over the years. There is also a yield benefit especially noticeable on years with low rainfall. H.P. requirements are not as great with the openers I have chosen. When I was using sweeps my 195 h.p. Now my fertilizer tank is twice as big and I can still go up one gear and throttle back.