Is there a way to tell replanted forests from original forests?

Hello.

I'm not sure my question makes a lot of sense but don't hesitate to help me improve my English.
The problem is the following: after discovering engineering, I tend to plant forests around cities that are already maxxed in population. But sometimes, I want to chop a forest or two, to help a city complete a building faster. Unfortunately, as everyone knows, you can't get the 10 shield bonus more than once from the same tile. Of course, late in the game, I often can't remember wether the forest was there from day one or if I chopped and replanted...
So, the question is: is there any way to know, other than trying and reloading?

I've done some serious chopping in culture-games and always forget which tiles I chopped/replanted. As far as I can tell, you don't know which tiles you have chopped... Unless you take a pic and assign dots or summat to the tiles afterwards.

CivAssist II will keep track for you. Other than that, the only way to tell is to keep track yourself since the beginning of the game.

CivAssist II is available in the downloads.

Well, thanks for the answers. I'll try Civassist.
But I wish they had given a specific look to replanted forests.