Castles and resources question

[Saxon]

The castle ended up being a place to hide and stop them advancing and I almost lost it twice. Once they attacked and I got very, very lucky. The second time I started with a big army, but they starved me and I lost 75% of the army before the relief force arrived. The third seige ended last night and I finally carried the seige over to their castle.

Now, once I capture it, does the division of resources change? That is, if I have two castles next to each other, do the resources get shared in any way?