Weed Management is almost always a challenge on vegetable farms.  Even if you do have a manageable weed pest, management practices come at some kind of cost, from herbicide cost to labor for hand or mechanical weeding. 

Dr. Stephen Meyers and Jeanine Arana just released a really nice article on the Purdue Vegetable Crops Hotline that summarizes cultural, mechanical/physical, biological, and chemical approaches for managing weeds on vegetable farms.  This article covers general farm sanitation to herbicides and tarping and flaming to cultivation techniques and everything in between.  Take a look at this article just to better understand the different tactics and strategies you can use to tackle your weeds this season.