Experts and BHG readers answer.
Urine burns in lawn
Sprinkle powdered gypsum on the yellow spots. It's inexpensive and available at garden centers. When it rains, the powdered gypsum will help to flush the urine down through the soil profile. Patch the dead spots by sprinkling a handful of grass seed in each. Store leftover grass seed in your refrigerator so it'll sprout quickly when sown in the lawn.