fence line

With spring here grass and weeds are starting to come up in my fence line. Does anyone use anything different than glyphosate or 24D for fence line maintenance? I’ve got 2 miles of fence that I’ve have to manage any experience with a Herbicide that last for a while is appreciated.

I am a college student designing a implement to handle tumbleweeds. I am sharing this so I can get feedback to design it with the costumers in mind. It is my goal to have a version that fits your needs.