https://www.watoxics.org/files/removing-lawn.pdf
excerpt-
Not interested in tilling anything if at all possible although it probably would work just fine. I do have quackgrass and crabgrass though and am going to have to cut off air and light to kill off those grasses. I've been saving corrugated cardboard. Thoughts were to butch the lawn low then follow up by slapping down and watering layers of newspaper then layering on leaves this fall which I can pick up easily enough in neighborhoods where they have curbside leaf pick up then slapping down a layer of cardboard and watering that then cover the cardboard with mulch. One problem. I've been checking into cardboard and am not exactly thrilled with what I am finding. Looks as if cardboard contains formaldehyde and some cardboard is flame resistant which has me really scratching my head as to what chemicals are used in the process of making it flame retardant. While formaldehyde may be great for pickling dead people, I don't know that I'm all that thrilled about layering cardboard on my existing lawn to rid myself of the grass any longer.Multiple-Till and Irrigation Method
In this method, the sod is covered with soil amendments and then rototilled. The area is watered to stimulate the growth of any weed seeds present, then tilled more shallowly to destroy the sprouted weeds. The process is repeated several times to deplete the seed reserve. Be warned that while this method is pretty effective at killing weeds, it may not completely kill invasive grasses, which get chopped up but can resprout from small pieces. So if you have lots of crabgrass or quackgrass, you may want to use one of the other methods instead. Another drawback for me is having to use machinery, but many guys see that as an advantage. If you are using a rented rototiller, You'll have to rent it more than once.
I'd like to go for about 1/3rd of an acre of turf in the next month of so. Not interested in spraying any type of glyphosate formulation. I'm now thinking it might be prudent to consider a 6â€