I qualify for a chapter 7; however, my property that isn't a homestead may be seized. It's my understanding that filing a chapter 13 will enable me to keep my land. Can someone please advise me on what I can do to exempt my other property (it's right beside my house, sharing the same fence line). I'm in Texas.

Each state has their own laws as to what is exempt. Normally it is a money value of property. So it may depend on what equity you have in those properties.

Now under a chapter 13, you work out a payment plan to keep property where you re-affirm certain debts and also pay unsecured according to a budget.

There is nothing you can do to exempt it, it is either exempt or it will not be under Texas bankrutpcy rules.