We have in the past couple of years cleared thicket and shrub to make additional pasture for my CFO's horses. As the grass/pasture area has expanded so has the bill for traditional type fertilizer and weed control. Besides, granules don't work well with horses and by the time you wait the 6-8 weeks for the granules to dissolve, half the summer is over here in WI. We used and still use Milorganite for fertilizer but Milorganite doesn't know the difference between fescue, dandelions or lamb ear and feeds them all.
With that said, I did my research over the winter for a sprayer. I knew I wanted something with a boom but wasn't sure if I wanted an ATV or trailer style. That wasn't until I saw a posting on MTF by royrector. So below is my sprayer build. Again, this is not an orginal idea of my own but information I gained here and other forums and this seems to be the best fit for me. I decided I like the idea behind NorthStar's broadcast lance nozzle versus a boom since I would not have to worry about trees or fence posts as much since nothing was extending further beyond the width of my tractor.
I was able to find a brand new 26 gallon ATV style on Craigslist even though a 16 would have probably been sufficient. I have used it 3 times since we purchased and so far am quite happy with it.
Went to the local Fastenal store and purchased 6 ft of 2 x 2 square tubing, made my measurements, cut the tubing to length and welded. (please go easy on the weld comments)