Texas Department of Agriculture Tags: Government Agency.The Texas Department of Agriculture (TDA) is a state agency within the state of Texas which is responsible for matters pertaining to agriculture rural community affairs and related matters.TDA was established by the 13th Texas Legislature in 1907. thumbnail formation year 1907-01-01T00:00:00+02:00 headquarter Austin Texas, Texas leader Todd Staples location Austin Texas, Texas number of employees 650 Learn more... Loading...