Public resources oriented at long-term productivity improvements, environmental sustainability and rural diversification yet attract a small share of government spending. Groundwater irrigation is under the management of fanner irrigation cooperatives, with their largest number being in the Central Anatolia and the largest-size cooperatives operating in the Aegean region. In the case of the Kalecik, Akinci, Asartepe, Gokceoren, Koprukoy right bank and left bank, Bolu, Kizilinnak and Kumbaba irrigation associations.