The answer to 'irrigation system brown patches' is that there are several common causes, including issues with the sprinkler heads, water pressure problems, and improper watering schedules. The symptoms are typically dry, discolored patches of grass that stand out from the rest of the lawn.
Some potential solutions include adjusting or replacing sprinkler heads, checking for leaks or clogs in the irrigation lines, and tweaking the watering schedule to provide the right amount of moisture for your lawn. In many cases, these issues can be resolved through DIY troubleshooting and maintenance. However, if the problems persist or you're unsure of the root cause, it's best to call in a professional landscaping or irrigation specialist to diagnose and fix the issue.