Comparison of above and below ground carbon stock across a different land use type: A casernof Jelo, Jelo-Muktar forest district, West Harrerge Zone, Oromiya Regional StaternErmias BekurernAddis Ababa University, 2013rnThe present study was conducted to access the carbon stock estimation and comparison ofrndifferent carbon pools (above ground, below ground, litter and soil organic carbon found inrnselected participatory and state managed old and young aged plantation and natural forestrnblocks .The biomass and carbon stock storage of each tree were determined by usingrnquadrant plots of 10 x 20 m distributed along transect lines. Considering different variablesrn(DBH classes, age groups.) General tropical dry forest biomass regression equation and directrnlaboratory result were usedrnThe studies revealed that above and below ground carbon stock of the old age natural forestrnblocks were 185.80 - 36.83 t ha -1, and above and below ground carbon stock of the youngrnage natural forest blocks were 29.80 --6.55 t ha-1), respectively.rnSoil organic carbon stock of the old age natural forest blocks was 107.31 t ha -1 and the youngrnage natural forest blocks were 127.5 t ha 1.Litter carbon stock of the old and the young agernnatural forest blocks were (3.98 t ha -1, 5.32 t ha-1), respectively.rnThe above and belowground carbon stock per hectare were higher for the old age group butrnthe young age forest blocks had higher Litter and soil organic carbon stock (t ha-1).rnWhile comparing with other studies, the old age natural forest block (above and below groundrncarbon) was larger than those estimates obtained in some countries and comparable tornestimates obtained in similar environmental conditions.rnConcerning plantation forest blocks ,The mean above and belowground carbon stocks of thernold age plantation forest blocks were (36.72 t ha-1, 7.34 t ha-1) and The mean above andrnbelowground carbon stocks of the young age plantation forest blocks were (31.1 t ha-1, 6 trnha-1 ). Soil organic carbon stock of the young and old age plantation forest blocks were (88.86rnt c ha -1; 59.45 t c ha -1), respectivelyrnThe above and belowground carbon stock per hector were higher for the old age .In contrastrnthe young age plantation forest blocks had higher soil organic carbon stock.rnKeywords: Biomass carbon stock, Land-use type, Carbon sequestration, Litter, Soil organic carbon