Table A1 Soil organic carbon distribution and methods of SOC determination in different land uses in Ethiopia
Referred journal | Research focus | Methods of SOC determination | Soil depth | Land use type | Reported SOC pool |
|---|---|---|---|---|---|
Yimer et al. 2006 | SOC and TN stocks as affected by topographic aspect and vegetation. | Walkely and Black wet oxidation method | 0-30 and 30-60cm | Cropland, grazing land and forestland | SOC stock (kg m−2) |
Yimer et al. 2007 | Changes in SOC and TN Contents in 3 adjacent land use types | Walkely and Black wet oxidation method | 0-20, 20-40, 40-100cm | Cropland, grazing land and forestland | SOC concentration (%) |
Gelaw et al. 2013 | Organic C and N associated with Aggregates and particle sizes under different land uses | CN analyser by dry combustion method | 0-10 and 10-20 cm | Rainfed crop production agroforest, open communal pasture, silvopasture, and irrigation based fruit production | SOC concentration (g/kg) |
Gelaw et al. 2014 | SOC and TN stocks in different Different land uses | CN analyser by dry combustion method | 0-15, 15-30 and 30-50 cm | Rainfed crop production agroforest, open communal pasture, silvopasture, and irrigation based fruit production | SOC concentration (g/kg) and stock (Mg/ha) |
Gelaw et al. 2015a | Land use impact on SOC TN storage | CN analyser by dry combustion method | 0-15, 15-30 and 30-50 cm | Rainfed crop production agroforest, open communal pasture, silvopasture, and irrigation based fruit production | SOC concentration (g/kg) and stock (Mg/ha) |
Gelaw et al. 2015b | Soil quality indices | CN analyser by dry combustion method | 0-15 cm | Rainfed crop production agroforest, open communal pasture, silvopasture, and irrigation based fruit production | SOC concentration (%) |
Berihu et al. 2017 | SOC and TN losses following deforestation | Walkely and Black wet oxidation method | 0-20 and 20-40 cm | Dense forest, open forest, grazing and farm land | SOC concentration (%) and Soil C sequestered (t/ha) |
Corral-Nunez et al. 2014 | Current and predicted trend of SOM | Walkely and Black wet oxidation method | 0-30 cm | Farm land and exclosures | SOC concentration (%) |
Kassa et al. 2017 | Impact of deforestation on soil ferility, soil C and nitrogen stock | Walkely and Black wet oxidation method | 0-20, 20-40, 40-60 and 60-80 cm | Forest, cropland and Agroforestry | SOC concentration (%) and stock (Mg/ha) |
Lemma et al. 2006 | Soil carbon sequetration under Different exotic tree species | Isotope ratio mass spectrophotometer | 0-5. 5-10, 10-20, 20-30 and 30-50 cm | Native forest, farm land and plantation | SOC concentration (g/kg) and stock (Mg/ha) |
Lemenih et al. 2005 | Changes in SOC and TN following reforestation of previously cultivated land | LECO-1000 CHN Analyzer | 0-10, 10-20, 20-40, 40-60 and 60-80 cm | Continuos cultivation, natural forest and plantation | SOC concentration (g/kg) and stock (g m-2) |
Yosef 2012 | Carbon stock potentials of woodlands | Walkely and Black wet oxidation method | 0-30 cm | Boswellia papyrifera woodland and farmland | SOC stock (Mg/ha) |
Bazezew et al. 2015 | Above-and below-ground C in a Community forest | Walkely and Black wet oxidation method | 0-10, 10-20 and 20-30 cm | Afromontane forest | SOC concentration (%) and stock (t/ha) |
Itanna et al. 2011 | Effect of land use change and soil type on SOC status | CN analyser by dry combustion method | Profile pits with varying depths ranging from 0- 140, 150, 160, 177 cm | Agroforestry and farmland | SOC concentration (g/kg) and stock (Mg/ha) |
Cardelús et al. 2013a | Assessment of Ethiopian sacred grove | Elemental analyser coupled to Isotope ratio mass spectrophotometer | 0-10 cm | Church forest | SOC concentration (%) |
Abera and Belachew 2011 | Effect of land use on SOC and TN | Walkely and Black wet oxidation method | 0-5, 5-15, 15-30 and 30-60 cm | Fallow, cultivated, natural forest and grassland | SOC concentration (%) |
Kim et al. 2015 | Impact of land use change on SOC and TN stocks | Walkely and Black wet oxidation method | 0-10, 10-20, 20-40, 40-70, 70-100 cm | Home garden and converted mono-crop field | SOC concentration (%) and stock (Mg/ha) |
Demessie et al. 2012 | Effects of eucalyptus and coniferous plantations on soil properties | Walkely and Black wet oxidation method | 0-10, 10-20, 20-40, and 40-60 cm | Eucalyptus and coniferous plantations | SOC concentration (%) |
Singh et al. 2010 | SOC concentration and stock under different land uses | Walkely and Black wet oxidation method | 0-10, 10-20, 20-40, 40-60, and 60-100 cm | Agroforestry and cropland | SOC concentration (%) and stock (Mg/ha) |
Shiferaw et al. 2015 | SOC to mitigate land degradation and climate change | Walkely and Black wet oxidation method | 0-30 cm | Cropland, grassland and forestland | SOC concentration (g/kg) |
Michelsen et al. 2004 | SOC stocks in different ecosystems | Shimadzu TOC analyser | 0-30, 30-55 and 55-100 cm | Dry deciduous forest, dry woodland and different types of wooded grassland | SOC concentration (%) and stock (Mg/ha) |
Gebremariam and Kebede 2010 | Effect of land use chnage on SOC, above-grounf biomass and aggregarte stability | Walkely and Black wet oxidation method | 0-15, and 15-30 cm | Farmland, forest land and uncontrolled grazing land | SOC concentration (%) and stock (t/ha) |
Tura and Eshetu 2013 | C stock in Church forests | Walkely and Black wet oxidation method | 0-30 cm | church forest | SOC concentration (%) and stock (Mg/ha) |
Assefa et al. 2017 | Effect of land use and deforestation on SOC and TN | CN Elemental analyser | 0-10, 10-20, 20-30 and 30-50 cm | Forest, Eucalyptus, grazing and cropland | SOC concentration (%) and stock (kg m-2) |
Haile et al. 2014 | Impact of land use change on SOC and TN | Walkely and Black wet oxidation method | 0-15, 15-30, and 30-45 cm | Cropland, grazing land and Eucalyptus camaldulensis woodlot | SOC concentration (%) and stock (Mg/ha) |
Girmay and Singh 2012 | Effect of land use change on SOC and soil quality | Walkely and Black wet oxidation method | 0-20, 20-40, 40-60 and 60-80 cm | Cultivated land, grazing land and area exclosure | SOC concentration (%) and stock (Mg/ha) |
Haileslassie et al. 2006 | Assessment of soil nutrient depletion on smallholder mixed farming system | Walkely and Black wet oxidation method | 0-30 cm | Enset-based farming and teff-based farming | SOC concentration (%) |
Vagen et al. 2013 | Mapping land degradation and soil properties using Landsat approaches | DC-IRS | 0-20, and 20-50 cm | Cropland and shrub land | SOC concentration (g/kg) |
Mohammed and Beleke, 2014 | Changes in C stock and sequestration potential under native forest and | Walkely and Black wet oxidation method adjacent land uses | 0-30 cm | Native forest, annual crop field and coffee based agroforestry | SOC stock (Mg/ha) |
Solomon et al. 2002b | SOM composition as influenced by deforestation and agricultural management | CN analyser by DC method | 0-10 cm | Forest and cropland | SOC concentration (g/kg) and stock (Mg/ha) |
Negash and Starr 2015 | Soil carbon stocks of indigenous agroforestry systems | LOI; ignition at 550oC for 2h | 0-30, and 30-60 cm | Agroforestry systems (Enset, Enste-Coffee and Fruit-Coffee) | Soil C stock (Mg/ha) |
Amare et al. 2013 | Predicting SOC using soil spectroscopy for Ethiopian highlands | Walkely and Black wet oxidation method and Reflectance spectrometer | Not specified | Cropland, grassland, forest land | SOC concentration (%) |
Belay et al. 2018 | C dynamics of dry tropical Afromontane forest ecosystems | LOI; ignition at 550oC for 2h | 0-10, 10-20, 20-30, and 30-50 cm | Church forest, Community forest and agricultural land | Soil C stock (t/ha) |
Negasa et al. 2017 | Variations in soil properties under different Smallholder farmers along a toposequence | Walkely and Black wet oxidation method | 0-20, 20-40, 40-60 and 60-100 cm | Agroforestry, cultivated land, and grazing land | SOC concentration (%) |
Welemariam et al. 2018 | SOC and MBC distribution under various land uses and management practices | Walkely and Black wet oxidation method | 0-15, and 15-30 cm | Terraced grazing land, exclosure with terrace, , exclosure alone, and non-conserved open and communal grazing land | SOC concentration (%) and Soil C stock (Mg/ha) |