Soil Properties and Soil Organic Carbon Stock Changes Resulted from Deforestation in a Semi-arid Region of Zagros Forests, Iran

Abstract. Research carried out on soil organic carbon stock (SOCS) in the Sudano-Sahelian region of Cameroon is very rare. The few existing studies are mostly available in reports and concern in most cases carbon stocks in plant biomass. In order to contribute to the documentation on soils in this part of the country, the present work was designed to evaluate the SOCS in the main soil types and the influence of environmental factors and soil properties on these stocks under the natural dry tropical area of the Sudano-Sahelian zone of Cameroon. The study was undertaken in four sites, including three natural forest reserves (Laf, Zamai, Kosohon) and one national park (Mozogo), located at different latitudes. Three replicates were collected at each site, giving rise to three sampling points chosen per site, from 0 to 75 cm depth, for the determination of SOCS. At each sampling point, soils were sampled using depth increments of 25 cm from the surface. The studied area is covered by Haplic Vertisols, Dystric Arenosols, Dystric Leptosols and Dystric Planosols. Total SOCS (T-SOCS) content, which refers to a depth of 75 cm, decreases with increasing latitude, with 249±26.26 Mg ha−1 in Vertisols at Laf forest reserve most southerly located, 199±8.00 Mg ha−1 in Arenosols at Zamai forest reserve, 166±16.63 Mg ha−1 in Leptosols at Kosohon forest reserve and 161±8.88 Mg ha−1 in Planosols at Mozogo national park most northerly located, regardless of the altitude. No significant correlation was noted between T-SOCS and the altitude. A good correlation was noted between precipitation which decreases with increasing latitude and T-SOCS, indicating the importance of climate in the distribution of T-SOCS in the study area, which directly influences the productivity of the vegetation. More than 60 % of the SOCS was stored below the first 25 cm from the soil surface, a peculiarity of SOCS in drylands. The SOCS in the Sudano-Sahelian area of Cameroon is mainly influenced by climate and vegetation.

Download Full-text

State-Space Estimation of Soil Organic Carbon Stock

International Agrophysics ◽

10.2478/intag-2014-0007 ◽

2014 ◽

Vol 28 (2) ◽

pp. 185-194 ◽

Cited By ~ 3

Author(s):

Joshua O. Ogunwole ◽

Luis C. Timm ◽

Evelyn O. Obidike-Ugwu ◽

Donald M. Gabriels

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Soil Properties ◽

State Space ◽

Carbon Stock ◽

Principal Component ◽

Reliable Estimate ◽

Soil Organic Carbon Stock ◽

Aggregate Fractions ◽

Organic Carbon Stock

Abstract Understanding soil spatial variability and identifying soil parameters most determinant to soil organic carbon stock is pivotal to precision in ecological modelling, prediction, estimation and management of soil within a landscape. This study investigates and describes field soil variability and its structural pattern for agricultural management decisions. The main aim was to relate variation in soil organic carbon stock to soil properties and to estimate soil organic carbon stock from the soil properties. A transect sampling of 100 points at 3 m intervals was carried out. Soils were sampled and analyzed for soil organic carbon and other selected soil properties along with determination of dry aggregate and water-stable aggregate fractions. Principal component analysis, geostatistics, and state-space analysis were conducted on the analyzed soil properties. The first three principal components explained 53.2% of the total variation; Principal Component 1 was dominated by soil exchange complex and dry sieved macroaggregates clusters. Exponential semivariogram model described the structure of soil organic carbon stock with a strong dependence indicating that soil organic carbon values were correlated up to 10.8m.Neighbouring values of soil organic carbon stock, all waterstable aggregate fractions, and dithionite and pyrophosphate iron gave reliable estimate of soil organic carbon stock by state-space.

Download Full-text

Assessment of soil organic carbon stock in major land uses of arid-region of Andhra Pradesh, India

Climate Change and Environmental Sustainability ◽

10.5958/2320-642x.2020.00017.4 ◽

2020 ◽

Vol 8 (2) ◽

pp. 171

Author(s):

R. Srinivasan ◽

Rajendra Hegde ◽

S. Srinivas ◽

K.V. Niranjana ◽

R. Vasundhara ◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Arid Region ◽

Carbon Stock ◽

Andhra Pradesh ◽

Land Uses ◽

Soil Organic Carbon Stock ◽

Organic Carbon Stock

Download Full-text

Effects of environmental factors and soil properties on soil organic carbon stock in a natural dry tropical area of Cameroon

10.5194/soil-2021-12 ◽

2021 ◽

Author(s):

Désiré Tsozué ◽

Nérine Mabelle Moudjie Noubissie ◽

Estelle Lionelle Tamto Mamdem ◽

Simon Djakba Basga ◽

Dieudonne Lucien Bitom Oyono

Keyword(s):

Environmental Factors ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Soil Properties ◽

National Park ◽

Carbon Stock ◽

Forest Reserve ◽

Soil Organic Carbon Stock ◽

Tropical Area ◽

Organic Carbon Stock

Abstract. Researches carried out on soil organic carbon stock (SOCS) in the Sudano-Sahelian part of Cameroon are very rare. The few existing ones are mostly available in reports and concern in most cases carbon stocks in plant biomass. In order to contribute to the documentation on soils in this part of the country, the present work was designed to evaluate the SOCS in the main soil types and the influence of environmental factors and soil properties on these stocks under the natural dry tropical area of the Sudano-Sahelian zone of Cameroon. The study was undertaken in four sites, including three natural forest reserves (Laf, Zamai, Kosohon) and one national park (Mozogo), located at different latitudes. Two replications were thereafter made, thus, giving rise to three sampling points chosen per site, from 0 to 75 cm depth, for the determination of the SOCS. At each sampling point, soils were sampled using depth increments of 25 cm from the surface. The studied area is covered by Haplic Vertisols, Dystric Arenosols, Dystric Leptosols and Dystric Planosols. T-SOCS content, which refers to a depth of 75 cm, decreases with increasing latitude, with 249±26.26 Mg.ha-1 in Vertisols at Laf forest reserve in the low latitude, 199±8.00 Mg.ha-1 in Arenosols at Zamai forest reserve, 166±16.63 Mg.ha-1 in Leptosols at Kosohon forest reserve and 161±8.88 Mg.ha-1 in Planosols at Mozogo national park in the high latitude, regardless of the altitude. No significant correlation was noted between T-SOCS and the altitude. A good correlation was noted between precipitation which decreases with increasing latitude and T-SOCS, indicating the importance of climate in the distribution of T-SOCS in the study area, which directly influence the productivity of the vegetation. More than 60% of the SOCS was stored below the first 25 cm from the soil surface, a peculiarity of SOCS in the drylands. The SOCS in the Sudano-Sahelian area of Cameroon is mainly influenced by climate and vegetation.

Download Full-text