You may have a very good problem there!! I think I would mow strips for planting leaving some "clusters" (dogghr will like that) of growth in the field. Sounds like the plot is large enough to create quite a bit of diversity
I know the conventional wisdom would be to leave some clusters or strips in the field and there is a lot of value to that. However I plan to replant the entire field. I'm not worried about 'cleaning the table' as this field is just a part of a mosaic of fields in the area. Close by is a 4 acre field of joint vetch and alyce clover attached to a 4 acre field of red clover and durana.
More important to me is an experiment I'm running with cover crops. That field is brick like red clay. So I have been double cropping it for the last couple of years with a multi specie summer and winter cover crop program to understand the impact on soil structure.I also added a solid dose of chicken litter last fall. Interestingly this field was 10' under water April 1. The floods receded and by April 14th it was dry enough to plant and obviously perfectly clean. Everything got a jump on weeds and field has done perfectly.
Doug, going from memory but planting rate per acre was:
50 lbs cow peas
25 lbs soy beans
15 lbs sunn hemp
5-6 lbs sunflowers. All drilled simultaneously
There was also a solid stand of crimson reseeded from previous yrs. crops