The front yard which is concrete and the backyard which is grassy are the toilet areas of our 3 dogs. With urine in the backyard, it is not an issue but urine in the concrete front yard would smell so we have to wash it off with half a bucket of water. For defecation, the poop would be covered with soil. We have a pile of clean and soft soil for this purpose. After a day, the covered poop can be picked up using a dust pan and stick broom. That applies to the front yard. With the backyard, the covered poop would decay into fertilizer so it is not needed to be cleaned up.
When we first got a puppy, that toilet training was the first issue and second is the toilet itself. That's why it is imperative for us to teach our dogs the proper toilet training, i.e. to use the yard for their call of nature. They never release anything inside the house because they know it is a sin.
