I'm assuming its granular fertilizer and weedkiller in a pressure bottle? And I'm assuming the weedkiller is sprayed directly on the weeds selectively and not the entire lawn? I also want to say this, where I live you don't need to be certified. I checked this out, BUT you can get certified if you want for about a hundred bucks. So is it worth it? knowledge wise I mean? The only other plus of being certified around here is that you can buy in bulk and you can advertise "certified". I might get certified just for that alone. I got three months to learn.