![Carbon stock and organic carbon dynamics in soils of Rajasthan, India [An article from: Journal of Arid Environments]](https://www.ebooknetworking.net/books/B00/0PA/bigB000PAUX52.jpg)
Carbon stock and organic carbon dynamics in soils of Rajasthan, India [An article from: Journal of Arid Environments]
Book Details
PublisherElsevier
ISBN / ASINB000PAUX52
ISBN-13978B000PAUX57
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Journal of Arid Environments, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Soil carbon stock (CS), was estimated in the 0-25 and 0-100cm soil depths of arid and semi-arid regions of Rajasthan. Carbon stock was 2.13Pg in the 0-100cm soil depth, of which 1.23Pg was soil organic carbon and 0.90Pg was soil inorganic carbon. The surface horizon (0-25cm) stored 31% of the soil carbon stock. Soil carbon stocks were higher in Entisols (0.72Pg or 33.6% of CS on 43.6% of the land area) and Aridisols (0.70Pg or 32.7% of CS on 28.9% of the land area) than in Inceptisols (0.61Pg or 28.6% of CS on 24.01% of the land area), Alfisols (0.015Pg or 0.007% of CS on 0.76% of the land area) and Verisols (0.105Pg or 0.005% of the CS on the 3.2% of the land area). Torripsamments, Haplocambids and Haplustepts together held 80% of CS and 86.9% of soil organic carbon stock, whereas Haplocambids, Petrocalcids and Haplustepts comprised 72% inorganic carbon stock. Soil organic carbon density (SOC) ranged from 4000 to 7000kg/km^2 in Haplustalfs, Haplusterts, Haplustepts and Torripsamments, while its inorganic counterpart (SIC) was of higher range (10,000-19,000kg/km^2) in Petrocalcids, Haplocalcids, Halpogypsids and Torrifluents. Under scrub vegetation of semi-arid Rajasthan the mean SOC in the 0-25cm and 0-100cm depths were 170 and 203.9kg/km^2, respectively. In the arid region with similar situation the mean SOC was 5.5 and 14.0kg/km^2, respectively. Excessive tillage and intensive cultivation in semi-arid region reduced soil organic carbon density from 60kg/km^2 under single cropping to 10.5kg/km^2 under double cropping. Subsistence farming in the arid region maintained 47kg/km^2 SOC under croplands. SOC declined regularly from 1975 to 2002 in the arid region. A multiple linear regression model that includes rainfall together with tillage, silt, clay, available water capacity (AWC) and period of canopy cover accounted for 97% of the variation in soil organic carbon density for arid regions. The regression model further pointed out that a 4200-4600kg/km^2/year SOC could be sequestered in untilled soils of the arid region, which have year-round canopy cover.
Description:
Soil carbon stock (CS), was estimated in the 0-25 and 0-100cm soil depths of arid and semi-arid regions of Rajasthan. Carbon stock was 2.13Pg in the 0-100cm soil depth, of which 1.23Pg was soil organic carbon and 0.90Pg was soil inorganic carbon. The surface horizon (0-25cm) stored 31% of the soil carbon stock. Soil carbon stocks were higher in Entisols (0.72Pg or 33.6% of CS on 43.6% of the land area) and Aridisols (0.70Pg or 32.7% of CS on 28.9% of the land area) than in Inceptisols (0.61Pg or 28.6% of CS on 24.01% of the land area), Alfisols (0.015Pg or 0.007% of CS on 0.76% of the land area) and Verisols (0.105Pg or 0.005% of the CS on the 3.2% of the land area). Torripsamments, Haplocambids and Haplustepts together held 80% of CS and 86.9% of soil organic carbon stock, whereas Haplocambids, Petrocalcids and Haplustepts comprised 72% inorganic carbon stock. Soil organic carbon density (SOC) ranged from 4000 to 7000kg/km^2 in Haplustalfs, Haplusterts, Haplustepts and Torripsamments, while its inorganic counterpart (SIC) was of higher range (10,000-19,000kg/km^2) in Petrocalcids, Haplocalcids, Halpogypsids and Torrifluents. Under scrub vegetation of semi-arid Rajasthan the mean SOC in the 0-25cm and 0-100cm depths were 170 and 203.9kg/km^2, respectively. In the arid region with similar situation the mean SOC was 5.5 and 14.0kg/km^2, respectively. Excessive tillage and intensive cultivation in semi-arid region reduced soil organic carbon density from 60kg/km^2 under single cropping to 10.5kg/km^2 under double cropping. Subsistence farming in the arid region maintained 47kg/km^2 SOC under croplands. SOC declined regularly from 1975 to 2002 in the arid region. A multiple linear regression model that includes rainfall together with tillage, silt, clay, available water capacity (AWC) and period of canopy cover accounted for 97% of the variation in soil organic carbon density for arid regions. The regression model further pointed out that a 4200-4600kg/km^2/year SOC could be sequestered in untilled soils of the arid region, which have year-round canopy cover.
