Looking at the photos of your garden over time, I began to wonder where you get all those rocks from.
Are they easy to find around where you live? Although it may be a problem for farming, it is a benefit in other ways. Here for example, we have to buy natural rocks every time we want to build something from them. And they are rather expensive, so often people buy the cheaper concrete stones.
Its quiet a gift from nature - too bad you cannot sell them via mail order... :)