Comparison of organic carbon stock of Regosols under two different climates and land use in Tunisia

The changes in the pattern of land use and land cover (LU/LC) have remarkable consequences on ecosystem functioning and natural resources dynamics. The present study analyzes the spatial pattern of LU/LC change detection along the Killiar River Basin (KRB), a major tributary of Karamana river in Thiruvananthapuram district, Kerala (India), over a period of 64 years (1957-2021) through Remote Sensing and GIS approach. The rationale of the study is to identify and classify LU/LC changes in KRB using the Survey of India (SOI) toposheet (1:50,000) of 1957, LISS-III imagery of 2005, Landsat 8 OLI & TIRS imagery of 2021 and further to scrutinize the impact of LU/LC conversion on Soil Organic Carbon stock in the study area. Five major LU/LC classes, viz., agriculture land, built-up, forest, wasteland and water bodies were characterized from available data. Within the study period, built-up area and wastelands showed a substantial increase of 51.51% and 15.67% respectively. Thus, the general trend followed is the increase in built-up and wastelands area which results in the decrease of all other LU/LC classes. Based on IPCC guidelines, total soil organic carbon (SOC) stock of different land-use types was estimated and was 1292.72 Mt C in 1957, 562.65 Mt C in 2005 and it reduced to 152.86 Mt C in 2021. This decrease is mainly due to various anthropogenic activities, mainly built-up activities. This conversion for built-up is at par with the rising population, and over-exploitation of natural and agricultural resources is increasing every year.

Download Full-text

Subsoil bulk density and organic carbon stock in relation to land use for a Western Australian Sodosol

Soil Research ◽

10.1071/sr01051 ◽

2002 ◽

Vol 40 (6) ◽

pp. 999 ◽

Cited By ~ 8

Author(s):

Ary Bruand ◽

Robert J. Gilkes

Keyword(s):

Land Use ◽

Organic Carbon ◽

Bulk Density ◽

Carbon Stock ◽

Clay Content ◽

Soil Survey ◽

Agricultural System ◽

Native Vegetation ◽

Cultivated Soil ◽

Organic Carbon Stock

It has been demonstrated that the high bulk densities of clayey subsoils of Sodosols can result from a process involving shrink/swell cycles and the development of ped coatings containing topsoil material. Our objective was to study this process according to land use and to compute the amount of organic carbon introduced into the subsoil as a consequence of ped coating in the subsoil. In an area located east of Katanning, we carried out an intensive soil survey and selected 2 closely adjacent sites with similar soils but differing in their land use: a cultivated soil and a never cultivated soil in an undisturbed strip of land. Pit faces and horizontal planes of the top of the subsoil were studied. The polygonal network corresponding to the cross-section of the prismatic peds was described. The clay content and bulk density of the prisms was determined. The carbon contents of the coatings and of the sandy material rich in organic carbon that corresponded to remnants of native vegetation was measured. Results showed that the coating process has occurred under native vegetation but is more active when the land has been used for agricultural and pastoral activities, as indicated by thicker sandy-clay coatings on the vertical faces of prisms and the higher bulk densities in the subsoil. The mean bulk density was 1.71 g/cm3 at 20-25 cm depth at the undisturbed site and was 1.86 and 1.82 g/cm3 at 20-25 and 25-30 cm depth, respectively, at the cultivated site. The total soil organic carbon stock was estimated to be close to 68.9 and 61.0 Mg/ha at the undisturbed and cultivated sites, respectively. The organic carbon stock in the subsoil was 38.5 and 23.3% of the respective total stocks. One fourth of the carbon stock in the subsoil corresponded to materials rich in organic carbon that originated from roots of native vegetation. The organic carbon stock in the ped coatings was <1% of the total stock at the 2 sites. Finally, our results support the adoption of zero-till agricultural system for the soil studied to restrict subsoil densification.

Download Full-text

Topography and land use change effects on the soil organic carbon stock of forest soils in Mediterranean natural areas

Agriculture Ecosystems & Environment ◽

10.1016/j.agee.2014.05.015 ◽

2014 ◽

Vol 195 ◽

pp. 1-9 ◽

Cited By ~ 56

Author(s):

M.L. Fernández-Romero ◽

B. Lozano-García ◽

L. Parras-Alcántara

Keyword(s):

Land Use ◽

Organic Carbon ◽

Land Use Change ◽

Soil Organic Carbon ◽

Forest Soils ◽

Carbon Stock ◽

Natural Areas ◽

Soil Organic Carbon Stock ◽

Organic Carbon Stock

Download Full-text

Assessment of soil organic carbon stock in different agro-ecological land use of Ri-Bhoi district, Meghalaya

AN ASIAN JOURNAL OF SOIL SCIENCE ◽

10.15740/has/ajss/15.1/27-33 ◽

2020 ◽

Vol 15 (1) ◽

pp. 27-33

Author(s):

Kabir Debbarma ◽

Naorem Janaki Singh

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Carbon Stock ◽

Soil Organic Carbon Stock ◽

Organic Carbon Stock

Download Full-text

Carbon Sequestration in the Soils under Horticulture Land Use in Haryana State

Indian Journal of Forestry ◽

10.54207/bsmps1000-2015-01tx99 ◽

2015 ◽

Vol 38 (1) ◽

pp. 11-16

Author(s):

M.K. Gupta ◽

S. Sharma ◽

Manoj Kumar

Keyword(s):

Land Use ◽

Organic Carbon ◽

Carbon Stock ◽

Variance Ratio ◽

Land Uses ◽

Mitigation Potential ◽

Soil Organic Carbon Stock ◽

Soc Stock ◽

Organic Carbon Stock ◽

One Way Anova

A study was undertaken in Haryana to estimate Soil organic carbon stock under different orchards available there under horticulture land uses which covered 47,036 ha area in Haryana. Maximum organic carbon stock was observed under Mango (36.24 t ha-1) followed by Nebu (35.85 t ha-1), Ber (30.37 t ha-1), Guava (29.45 t ha-1), Kinnu (25.11 t ha-1), Aonla (24.67 t ha-1), Malta (24.20 t ha-1) and the least was under the combination of Aonla + Anar (14.97 t ha-1). When SOC stock under different horticulture species was tested by one - way ANOVA, it was found that SOC stock under different species was significantly different (Variance ratio, F = 4.086; p = < 0.05). SOC stock under Mango was significantly different from the SOC stock under all other species except Nebu, Malta and Grapes. Mitigation potential indicates that soils under Mango and Nebu can sequester nearly two and half times more SOC as compared to that in Aonla + Anar orchard, while the soils under Ber and Guava and Kinnu can sequester nearly double the amount of SOC stock in comparison to Aonla+ Anar orchard. Over all, in Haryana the soils under horticulture land use have 1.37 million tones of SOC stock which is equivalent to 5.05 million tons of CO2.

Download Full-text

Soil organic carbon stock as affected by land use/cover changes in the humid region of northern Iran

Journal of Mountain Science ◽

10.1007/s11629-013-2645-1 ◽

2014 ◽

Vol 11 (2) ◽

pp. 507-518 ◽

Cited By ~ 15

Author(s):

Samereh Falahatkar ◽

Seyed Mohsen Hosseini ◽

Abdolrassoul Salman Mahiny ◽

Shamsollah Ayoubi ◽

Shao-qiang Wang

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Carbon Stock ◽

Northern Iran ◽

Soil Organic Carbon Stock ◽

Humid Region ◽

Organic Carbon Stock

Download Full-text

Aggregate characteristics and aggregate-associated soil organic carbon and carbohydrates of soils under contrasting tree land use

Sains Tanah - Journal of Soil Science and Agroclimatology ◽

10.20961/stjssa.v18i2.53615 ◽

2021 ◽

Vol 18 (2) ◽

pp. 126

Author(s):

Bassey Udom ◽

Joshua Ogunwole ◽

Chima Wokocha

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Oil Palm ◽

Carbon Stock ◽

Aggregate Size ◽

Soil Organic Carbon Stock ◽

Size Fractions ◽

Land Use Types ◽

Organic Carbon Stock

Protection of soil organic carbon and acid-hydrolyzable carbohydrates in aggregate-size fractions is important for appraising soil degradation and aggregation under land use types. Aggregate-associated soil organic carbon (SOC) and acid-hydrolyzable carbohydrates (R-CHO) in bulk soils and aggregate-size fractions of a sandy loam soil under Alchornea bush, Rubber, Oil palm and Teak plantations in southern Nigeria were studied. Results revealed significant differences in aggregate-associated SOC and R-CHO, bulk densities, total porosity, soil organic carbon stock and aggregate stability among the land use types. Greater SOC was stored in macro-aggregates >0.25 mm, while greater R-CHO was occluded in micro-aggregates <0.25 mm (p<0.05). The highest mean weight diameter (MWD) was 1.01 mm in Alchornea soils and 0.92 mm in Oil palm plantation at 0-15 cm topsoil. Soil organic carbon stock in 0-15 cm topsoil was 77.7, 81.8, 92.2, and 67.5 kg C ha-1 in Alchornea, Rubber, Oil palm, and Teak soils, respectively. Relationships showed a positive linear correlations between MWD and SOC (r = 0.793, p < 0.05) and R-CHO (r = 0.789. p < 0.05). Alchornea bush and Oil palm plantation increased macro-aggregate formation and macro-pores >5 µm, therefore they have greater potentials to boost protection of SOC in soil macro-aggregates.

Download Full-text