C-equivalent correction factor for soil organic carbon inventory by wet oxidation, dry combustion and loss on ignition methods in Himalayan region

Kumar, Suresh; Ghotekar, Yogesh; Dadhwal, V. K.

doi:10.1007/s12040-019-1086-9

Cited by 14 publications

(7 citation statements)

References 34 publications

(38 reference statements)

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“…Second, a potential source of uncertainty may be the analytical method employed for analysis; for most samples (97 %), SOC content was analyzed using the wet-oxidation method, and a small number were analyzed by total combustion (CN elemental analyzer). Discrepancies in SOC results between combustion methods have identified wet combustion as a less reliable assessment method for SOC, as it tends to underestimate organic carbon at higher SOC contents (Kumar et al, 2019) and potentially overestimates it in highly reduced soils (Chatterjee et al, 2009). This issue has not been addressed in Chile to date.…”

Section: Data Harmonization Processing and Caveatsmentioning

confidence: 99%

CHLSOC: the Chilean Soil Organic Carbon database, a multi-institutional collaborative effort

Pfeiffer

Padarian

Osorio

et al. 2020

Earth Syst. Sci. Data

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Abstract. A critical aspect of predicting soil organic carbon (SOC) concentrations is the lack of available soil information; where information on soil characteristics is available, it is usually focused on regions of high agricultural interest. To date, in Chile, a large proportion of the SOC data have been collected in areas of intensive agricultural or forestry use; however, vast areas beyond these forms of land use have few or no soil data available. Here we present a new SOC database for the country, which is the result of an unprecedented national effort under the framework of the Global Soil Partnership. This partnership has helped build the largest database of SOC to date in Chile, named the Chilean Soil Organic Carbon database (CHLSOC), comprising 13 612 data points compiled from numerous sources, including unpublished and difficult-to-access data. The database will allow users to fill spatial gaps where no SOC estimates were publicly available previously. Presented values of SOC range from 6×10-5 % to 83.3 %, reflecting the variety of ecosystems that exist in Chile. The database has the potential to inform and test current models that predict SOC stocks and dynamics at larger spatial scales, thus enabling benefits from the richness of geochemical, topographic and climatic variability in Chile. The database is freely available to registered users at https://doi.org/10.17605/OSF.IO/NMYS3 (Pfeiffer et al., 2019b) under the Creative Commons Attribution 4.0 International Public License.

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Section: Data Harmonization Processing and Caveatsmentioning

confidence: 99%

CHLSOC: the Chilean Soil Organic Carbon database, a multi-institutional collaborative effort

Pfeiffer

Padarian

Osorio

et al. 2020

Earth Syst. Sci. Data

View full text Add to dashboard Cite

show abstract

“…The difference in the analytical methods could be a source of uncertainty for future modelling initiatives which is not properly addressed in Chile on a national level. Discrepancies in the results of SOC analyses between combustion methods have identified wet combustion as an unreliable assessment method for SOC (Kumar et al, 2019). This is not yet properly addressed in Chile, as the recommended methods for SOC determination are still wet oxidation and loss on ignition, not mentioning dry combustion as a more accurate alternative (Sadzawka et al, 2006).…”

Section: Data Harmonization Processing and Caveatsmentioning

confidence: 99%

CHLSOC: The Chilean Soil Organic Carbon database, a multi-institutional collaborative effort

Pfeiffer¹,

Padarian²,

Osorio³

et al. 2019

Preprint

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Abstract. One of the critical aspects in modelling soil organic carbon (SOC) predictions is the lack of access to soil information which is usually concentrated in regions of high agricultural interest. In Chile, most soil and SOC data to date is highly concentrated in 25 % of the territory that has intensive agricultural or forestry use. Vast areas beyond those forms of land use have few or no soil data available. Here, we present a new database of SOC for the country, which is the result of an unprecedented national effort under the frame of the Global Soil Partnership that help to build the largest database on SOC to date in Chile named “CHLSOC" comprising 13,612 data points. This dataset is the product of the compilation from numerous sources including unpublished and difficult to access data, allowing to fill numerous spatial gaps where no SOC estimates were publicly available before. The values of SOC compiled in CHLSOC range from 6×10−5 to 83.3 percent, reflecting the variety of ecosystems that exists in Chile. Profiting from the richness of geochemical, topographic and climatic variability in Chile, the dataset has the potential to inform and test models trying to predict SOC stocks and dynamics at larger spatial scales. Dataset available at https://www.doi.org/10.17605/OSF.IO/NMYS3 (Pfeiffer et al., 2019b).

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“…In our study, K showed a significant positive relationship with OC and SOM. This was reinforced by the finding of Gairola et al [52] and Kumar et al [70] and concluded that a layer of SOM enhances the K retention in the soils considerably. Greater K release is associated with oak individuals, which is the primary explanation for the greater K content in the soils of Moru oak and Kharsu oak forest [53].…”

Section: Influence Of Soil Nutrientsmentioning

confidence: 82%

Influence of Anthropogenic Activities on Forest Carbon Stocks—A Case Study from Gori Valley, Western Himalaya

et al. 2022

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Carbon stock assessment in various ecosystems is vital for monitoring the health of these ecosystems and national accounting for the United Nations convention on climate change. The influence of various anthropogenic drivers on carbon stock in different ecosystems has not been examined comprehensively. This study aims to determine the impact of anthropogenic pressures (lopping, cutting, grazing) on soil physico-chemical properties and carbon stock in four temperate broadleaf forests dominated by different species of oak, viz., Banj oak (Quercus leucotrichophora), Rianj oak (Quercus lanuginosa), Moru oak (Quercus floribunda) and Kharsu oak (Quercus semecarpifolia) along an elevation gradient from 1700–3000 m asl in Gori valley, western Himalaya. Biomass data were collected from 120 quadrats of 10 × 10 m size at three distinct altitudes (4 forest sites × 3 altitudes × 10 quadrats) and analysed for carbon stock, whereas soil samples were randomly collected in triplicate from three depths of each altitude of the forest site and further analysed for their physico-chemical properties. A total of 767 individual trees with a diameter of ≥31 cm were measured at twelve sites and standing biomass was estimated following the growing stock volume equations. Mean carbon stock was highest in Moru oak (396.6 ± 29.5 Mg C ha−1) and lowest in Banj oak forest (189.3 ± 48.6 Mg C ha−1). We also found soil to be the largest pool of forest carbon (43.0–59.7%) followed by aboveground biomass (31.5–45.0%), belowground biomass (8.4–11.7%) and litter (0.4–0.5%). The basal area showed significant effect on altitude and carbon stock, whereas disturbance showed significant (p < 0.05) negative correlation with the total carbon stock. Soil nitrogen exhibited a significant positive correlation (R2 = 0.60) with the basal area, indicating that nitrogen enhances tree growth and forest carbon stock. However, anthropogenic disturbance showed a significant negative impact on the basal area, soil nutrients and carbon stock of oak forests. This concludes that forest structure, anthropogenic pressure and soil parameters contribute to the carbon stock of the area. Considering the significance of these overexploited oak forests, it is recommended to conserve the old-growth forest species in the study area, since they have the highest carbon accumulation potential.

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C-equivalent correction factor for soil organic carbon inventory by wet oxidation, dry combustion and loss on ignition methods in Himalayan region

Cited by 14 publications

References 34 publications

CHLSOC: the Chilean Soil Organic Carbon database, a multi-institutional collaborative effort

CHLSOC: the Chilean Soil Organic Carbon database, a multi-institutional collaborative effort

CHLSOC: The Chilean Soil Organic Carbon database, a multi-institutional collaborative effort

Influence of Anthropogenic Activities on Forest Carbon Stocks—A Case Study from Gori Valley, Western Himalaya

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