Question
We have nut grass/weed in our front and back yards.  What's the best product....and the best ways to combat this?  

Answer
Nutgrass is a very difficult weed to control and will likely require several applications. I have attached a link to a good website. Note the herbicide names mentioned are their chemical names (you can find these on the back of the lable on the bottles/boxes)

http://muextension.missouri.edu/explore/agguides/hort/g06750.htm