Predator (including human) urine is usually not effective against other predators. I am from the Mid-West US, and we have Eastern Wild Turkeys, Which are a very different bird but they can still c ause some problems. Urine is not effective against Turkeys because they have sight based defenses. Out here the only time urine would be used would be to keep away coyotes, rabbits, deer, etc. It just depends upone what type of urine, human or wolf can be best in my experience. There are chemicals available in flower catalogs that you can put out and will work for weeks to months, never used them but I know they exist.
The best protection in my experince is a chicken wire fence. I usually limit my plants to about 4 feet. I put out three-foot high chicken wire fence in a circle about 3 ft in diameter. In my experince, use branches and tent stakes to pin it down and bury a few inches to prevent burrowing by small animals. GL