Texas has an Ag exemption but it is for crops or livestock. Then we got the opportunity for a wildlife exemption and I sold my cows and horses. Now, there about a half dozen things that I can do but only have to do 4.

I provide supplemental water for wildlife. That's my ponds.
I build brush piles for small animals to escape predation.
I provide supplemental food. That's generally a wheat patch when we get rain. I also feed the deer a lot of corn, put out bird houses and have bird feeders.
Do a wildlife census using game cams. I load up my annual report with pictures. I
I also load up with pictures of kids that I take fishing, hunting, etc. That' not one of the requirements but I figure it helps.

Without the exemption my place would be taxed almost like city property.