Years ago when I lived in a house and planted a garden only to find out the truth about those dang little yellow flowers
When I realized they came from tiny 'bulbs', some that went about 3 feet down, I knew I wouldn't win unless I got rid of every last bulb I could. And I didn't want to use poison. I made two sifting screens, one 1/4 inch mesh and one 1/8 inch mesh and so I dug up that whole place and sifted the heck out of it. I missed a few of the rascals but I had a garden where there once was a mass of oxalis. Good luck.