The number of acres needed depends on the agricultural activity of the property. For example, the bee keeping requirement is a minimum of 5 acres and cannot exceed 20 acres.  Five acres may be sufficient for intensive farming uses. Travis County has a minimum requirement of 4 animals units for grazing land which would generally require a minimum of 12 acres on the East side of IH 35 and 20 acres on the West side. This guideline of 12 acres on the East side of IH 35 and 20 acres on the West side also applies to land used for dryland and irrigated farming and hay production. Please review the TCAD Guidelines for the Appraisal of Open-Space Land for additional information.