What has taken over my food plot?

[QDM4ME]

Looks like witch grass. Smart move mowing it.
Had a section of my soybean field last year get taken over by the stuff.
A pic from the net....

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[landtracdeerhunter]

A summer furrow program will eliminate most weed growth without spraying. Plowing the soil in June, then working the soil when weed growth begins throughout the summer months. Plant in August.  Save $.

[Gencountyzeek]

For those of us...like me, what's a summer furrow program?  Also I have a small disc and single bottom plow for my sub compact tractor, that's all the equipment I have. I like to plant something in the spring, but I also want something for the fall and winter. I will gladly except all the expert advise I can get.