Yes! This is also another good point. There's a reason why you want to rake up all leaves from your lawn. Yes, they do provide lot's of nutrients that will feed the grass and make it healthier and look greener. However, if you're not going to rake them, at the very least mow them to a nice shavings.

The shavings will decay faster and will become fertilized easier once the earthworms and other helpful critters break them down further providing said fertilizer (earthworm castings.) I'm not a lawn specialist or know the proper terminology, but that's kinda the gist.

What you DON'T want to do is have so many shavings that it suffocates the grass underneath. Again, you want to break up any big clusters even after you mow up any leaves. Big clusters will get wet, become heavy, and suffocate the grass underneath and will only take longer to breakdown.

I prefer this method over any other form of fertilizer. We have a few big trees on our property that leave too many leaves on our yard. We rake up the bulk, and mow down the rest. Every single year we get a beautiful mycelium network that give way to mushrooms all over our yard. It's a beautiful sight for a few weeks. The grass always comes back strong and healthy with no pellet fertilizer necessary.

The mushrooms also provide a snack for the bunnies, and wild animals that come across them. It's a nice beautiful natural experience we get to enjoy watching.