Redstone Comparator Functionality with Things that Grow on Farmland.

My idea is when wheat is at it's lowest point, it doesn't power the redstone comparator, but when it grows more, the signal gets stronger and stronger until then wheat is fully grown to which the signal is at it's highest. This can be used for more advanced auto farms and it doesn't even have to be just wheat. It can be all the other foods that grow on farmland. I feel like this would please the redstone community and make really cool ideas!