I think back to the 1980's when I started farming. This is before direct seeding and regular roundup use.
Quack grass was a big one for us, especially on lighter land that we didn't want to work as much. Wild millet and Russian thistle are others that have become less and less of an issue with changes to how we farm. I always have felt with a good diverse crop rotation weed problems get looked after, but crop economics make us divert from the plan. Dr Dwayne Beck at Pierre SD always had a very good plan for crop rotations that dealt with weed issues to a great extant but the bottom line is always what pays best. The warm season / cool season broadleaf and grass no till crops can have a huge affect on the weed bank.
Quack grass was a big one for us, especially on lighter land that we didn't want to work as much. Wild millet and Russian thistle are others that have become less and less of an issue with changes to how we farm. I always have felt with a good diverse crop rotation weed problems get looked after, but crop economics make us divert from the plan. Dr Dwayne Beck at Pierre SD always had a very good plan for crop rotations that dealt with weed issues to a great extant but the bottom line is always what pays best. The warm season / cool season broadleaf and grass no till crops can have a huge affect on the weed bank.
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