Dynamics of soil organic carbon stocks in the Guinea savanna and transition agro-ecology under different land-use systems in Ghana

Bessah, Enoch; Bala, Abdullahi; Agodzo, Sampson K.; Okhimamhe, A. A.

doi:10.1080/23312041.2016.1140319

Cited by 27 publications

(19 citation statements)

References 21 publications

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“…This could be ascribed to high organic matter, better aggregation, particle size distribution, and root penetration in the surface layers. The results are in agreement with the findings of Ahmed (2002) and Bessah et al (2016) who reported that bulk density values revealed increasing trend with depth in all land uses. Moreover, the critical values of bulk density for plant growth at which root penetration is likely to be severely restricted in clay loam soil is 1.6 g/cm 3 (Jones, 1983).…”

Section: Soil Bulk Densitysupporting

confidence: 93%

Soil organic carbon stock under different land use types in Kersa Sub Watershed, Eastern Ethiopia

Mulat¹,

Kibret²,

Bedadi³

et al. 2018

Afr. J. Agric. Res.

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Understanding and assessing soil organic carbon stock (SOCS) within the framework of greenhouse gas emissions and land degradation is so crucial in combating climate change and enhancing ecological restoration. The goal of this study was to quantify the current SOCS in major land use types in Kersa sub watershed, eastern Ethiopia. Replicated soil samples from 0 to 20, 20 to 40, and 40 to 60 cm depth were collected from three major land uses types: grazing, cultivated, and fallow lands. Analysis of variance (ANOVA) was used to compare means and Pearson correlation analysis was used to see relationships between selected soil parameters. The results of the study revealed significant difference in soil organic carbon stock under the different land use types (P≤ 0.05). Soil under grazing land use type had significantly higher values of SOCS (42.9 t/ha and 32.9 t/ha) than cultivated land use type (32.6 t/ha and 26.3 t/ha) and fallow land use type (23 t/ha and 12.5 t/ha) in surface and sub surface layers, respectively. Similarly, SOCS decreased with soil depth in all the land use types and showed positive and significant correlation (P≤ 0.05) with clay content while negatively and significantly correlated with bulk density. The results show potential contribution of vegetation cover in land use to enhance soil organic carbon sequestration and environmental protection.

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Section: Soil Bulk Densitysupporting

confidence: 93%

Soil organic carbon stock under different land use types in Kersa Sub Watershed, Eastern Ethiopia

Mulat¹,

Kibret²,

Bedadi³

et al. 2018

Afr. J. Agric. Res.

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“…Sand correlated negatively (r = −0.310, p<0.01) with TOC implying that, where sand is high, clay is expected to decrease resulting in decreased TOC ( Table 2). Similar results were also found by Hairiah and van Noordwijk [32].…”

Section: Soil Texturesupporting

confidence: 91%

“…Maximum pH values of 7.19 and 8.42 were recorded in Kalinagar and Durganagar soils, respectively at 45-60 cm depth. Soil pH increased with soil depth in all land use/cover types [32,33]. A strong negative correlation (Table 3) observed between TOC and soil pH (r = -0.756, p<0.01) indicating that an increase in TOC decreases the soil pH.…”

Section: Soil Phmentioning

confidence: 91%

Vertical Distribution of TOC, TN and Other Important Soil Attributes and Their Relationship in Alfisol and Entisol of West Bengal

Rakesh

Sinha

Mukhopadhyay

2020

IJECC

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A study to assess the profile distribution of important soil attributes in Alfisols and Entisols of West Bengal was conducted during 2016-17. Purposefully selected random sampling was carried out to collect the soils from different locations of two study sites, viz., Kalinagar (25º27'33.9"N, 88º19'10.2"E) from Malda district and Durganagar (26º09'62.7"N, 89º53'51.7"E) from Cooch Behar district of West Bengal at 0-15, 15-30, 30-45 and 45-60 cm depths. Understanding of vertical distribution of soil fertility indicators like soil organic carbon (SOC), total nitrogen (TN) and other important properties in two different soil and climatic conditions will provide an insight regarding the behaviour of soil with the change in environmental conditions. Soil bulk density (BD), porosity, pH, SOC, TN, C:N ratio and texture were determined using standard laboratory procedures and computations. Obtained results were subjected to statistical analyses. Soils of Kalinagar sites were slightly acidic in nature while soils of Durganagar were neutral in nature. Kalinagar soils were silt clay loam in texture where Durganagar soils classified as loam to sandy loam. Soil BD values increased with depth in both Kalinagar (Alfisol) and Durganagar (Entisol). The porosity percentage IJECC, 10(1): 62-73, 2020; Article no.IJECC.54438 63 progressively decreased with an increase in depth. Soils of Durganagar reported higher soil porosity at all the depths studied. An increase in soil pH with increasing depth was observed in both the sites. The mean total organic carbon (TOC) content recorded maximum in surface soil and its concentration decreased with the depth. Kalinagar soils observed 7.63% higher TOC (17.94 g kg -1 ) content than Durganagar (16.57 g kg -1 ) at surface depth (0-15 cm) and its accumulation at the lower depths was also maximum in former soil. Mean TN values were also found to decrease by increasing the depth. The accumulation of total nitrogen at the subsequent depths was relatively higher in Kalinagar than Durganagar. Increase in C:N ratio with increasing depth was noticed in Kalinagar site but the opposite trend was accorded in case of Durganagar. Accumulation of SOC and TN throughout the soil depth was found to be greater in Alfisol (Kalingar) due to higher clay and silt fractions as compared to Entisol (Durganagar). There was a significant positive relation of TOC with clay and silt (r = 0.285, p<0.05, r = 0.314, p<0.01, respectively) and of TN with clay and silt (r = 0.328, p<0.01, r = 0.262, p<0.05, respectively) irrespective of soil orders. Alfisols with high bulk density have a greater capacity to accumulate SOC and TN throughout the soil profile due to higher clay and silt fractions in comparison to Entisols with loose textural properties. Original Research Article

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“…Batlle‐Bayer et al () argued that not only land use, but also soil clay and Fe and Al oxides content keep C stable in specific Cerrado soils, such as those analyzed in the present study. Interestingly, all these results in the Brazilian Cerrado are higher than some reported for African Savannah, i.e ., 29.3–33.3 Mg C ha −1 for maize fields in Ghana ( Boakye‐Danquah et al, ), 29–40 Mg C ha −1 from cashew plantation and native vegetation in Guinea savanna ( Bessah et al, ), and 17–50 Mg C ha −1 for woodland Savanna in Sudan ( Boakye‐Danquah et al, ) (all these values were proportionally converted from 0–30 cm to 0–40 cm soil layer).…”

Section: Discussionmentioning

confidence: 99%

C and N stocks are not impacted by land use change from Brazilian Savanna (Cerrado) to agriculture despite changes in soil fertility and microbial abundances

Lammel

Butterbach‐Bahl

Cerri

et al. 2017

J. Plant Nutr. Soil Sci.

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Central Brazil is the region with the most dynamic agriculture expansion worldwide, where tropical forests and Cerrado (Brazilian savanna) are converted to pastures and crop fields. Following deforestation, agricultural practices, such as fertilization, tillage and crop rotations, alter soil parameters and affect microbial abundances and the C and N cycles. The objective of this study was to compare changes in soil fertility, stocks of soil C and N, microbial biomass, and abundance of bacteria, fungi and archaea in Cerrado soils following land use change to crops (soybean/corn/cotton) and pasture (the perennial forage grass Brachiaria brizantha A. Rich.). Agriculture increased soil fertility and conserved soil C and N since their absolute concentration values were highest in agriculture soils and the C and N stocks adjusted by soil density were similar to the native vegetation soils. At the same time, agriculture changed the microbial abundances (decrease of microbial biomass C and N, increase of archaea, and reduction of bacteria and fungi at the crop sites), and N dynamics (increase of soil ammonium and nitrate concentrations). Even if these changes can be beneficial for food and agricultural commodities production, all these soil alterations should be further investigated due to their possible unknown effects on biosphere-hydrosphere-atmosphere exchange processes such as greenhouse gases emissions and nitrate leaching.

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Dynamics of soil organic carbon stocks in the Guinea savanna and transition agro-ecology under different land-use systems in Ghana

Cited by 27 publications

References 21 publications

Soil organic carbon stock under different land use types in Kersa Sub Watershed, Eastern Ethiopia

Soil organic carbon stock under different land use types in Kersa Sub Watershed, Eastern Ethiopia

Vertical Distribution of TOC, TN and Other Important Soil Attributes and Their Relationship in Alfisol and Entisol of West Bengal

C and N stocks are not impacted by land use change from Brazilian Savanna (Cerrado) to agriculture despite changes in soil fertility and microbial abundances

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