To add to John's post. As he 'owns the trees' and you don't you have to reach agreement to use the land in anyway that effects his timber. So if you want to clear a pasture or plant a garden (clear trees to increase sunlight), you need his permission and have to compensate him for the timber. Also his interest will reduce resale of the land
should you ever chose to
sell. Who wants to buy your place if they don't own or have clear control to the property?
Also, rights vary from state to state, but expect that he will have some rights to come and go from the property to inspect the timber. As a woman 'moving on with her life' after a divorce, do you really want your ex to be coming and going from a small parcel of land? Could make you or a potential partner in the future uncomfortable. Compensate him for the future value of the timber and make a clean break. Co owning property with an ex spouse is never easy even in amicable splits.