The answer to 'lawn fertilization yellowing' is that it is often caused by over-fertilization or applying the wrong type of fertilizer. This can lead to a buildup of salts or nutrients that damage the lawn, causing it to turn yellow or brown. Symptoms may include patchy discoloration, burned leaf tips, and overall poor lawn health.
To fix this issue, you'll need to adjust your fertilization schedule and product selection. For minor cases, you may be able to solve the problem by watering the lawn deeply to flush out excess salts. However, if the damage is more severe, you may need to aerate the soil and re-seed or re-sod the affected areas. In some cases, it's best to call a professional lawn care service to properly diagnose and treat the problem.