the largest forest available in horro guduru wollega is called chato ( 'bosona caatoo' in afan oromo). the forest lies approximately between 9 40’- 90 42’ n latitudes and 36 59’-37 00’e longitudes (ema, 1988) in the horo district 30 km north-west of shambu which is located at about 314 km west of addis ababa.