Determining Cost of Land for an Asset

I have property that I inherited from my great grandfather that I run cows on and plant pecan trees.  I did not purchase this property other than winning a settlement in court a few years ago.  I am entering an asset:

Farm Equipment, Animals, Agriculture

Trees and Vines bearing fruit and nuts, orchards

Date planted: 03/13/2022

On the fourth page, I describe my asset, put down a dollar amount (cost).

Now it is asking me the cost of land.  I didn't purchase this.  What would I enter here?  Would I need to do a fair market appraisal?  Enter how much it is worth on the property taxes?  Or leave this blank?