I like farming, but I hate having to go through and replow the little 1-2 squares of plowed land that decay in my plots. I propose that the chance of a square of plowed land decaying be influenced by the number of plowed squares around it. A square surrounded by plowed land would be less likely to decay than a single plowed square surrounded by the wild.
I'm not going to argue from realism here. I'm supporting this because I feel it would remove some of the tedium of plowing. (carry plow to single square, plow single square, carry plow to next single square). If it works like how I think it does, for the most parts plots will be absorbed by the wilderness around them as opposed to disappearing piecemeal.
I don't know how I would fit paved squares in this, as they don't decay.