Thanks for the replies. I'll try to be short. With horses and travel you pick up burdock. THIS year almost all of my fencelines are growing burdock "trees," what with all of the rain.

Fortunately a good 85% of them are first year plants, which means they don't have any burrs on them, plus burdock leaves are actually good for your skin, and I have never gotten a rash even hand pulling them. Also, a blessing is that they have shaded out most of the other weeds like thistle and other noxious ones. My solution is upcoming. We have a local yard machinery store chain (only two stores) that rent bush-hogs, which are brush mowers that have a wide swath and can also chop down any saplings, since we get "trees of paradise", too along the fencelines. If you rent one on a Saturday morning, you don't have to return it until Monday, so you get 2 days worth with a single day's rental. On the weekend of the 18th-19th (July, 2015) my DH and two DD's are going to work as a team to clear all of the fencelines of all weeds and saplings. One will operate the bush hog, another will pile up the cut brush on the back of the truck to move to our bonfire pile, and the other two will kill the vegetation under the fencerows. After each break we will rotate jobs. BIG job, if you break up each fence to fence because there are 18 sections, with some short and others several hundred feet long. The shorter ones are jampacked, and the longer ones, not so much.
I'm having trouble with my sprayer, so I'll check it next week when I get home from my Colorado vacation, and buy a new one, if I have to, plus buy as much vegetation killer as possible to finish up the job. You buy mass quantities, then save the receipts for returns of unused. Vegetation killer will kill everything it touches for about one year, enough time to give me a breather from mowing these weeds.
Wish me luck. I'll report back in a few weeks, and take some pictures for your perusal and perspective.
