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Satish Kumar, T.
- Light Hydrocarbons Geochemistry of Surface Sediment from Petroliferous Region of the Mehsana Block, North Cambay Basin
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Authors
Affiliations
1 Stable Isotope and Surface Geochemical prospecting of Hydrocarbon, National Geophysical Research Institute (Council of Scientific and Industrial Research), Hyderabad - 500 606, IN
2 Stable Isotope and Surface Geochemical Prospecting of Hydrocarbon, National Geophysical Research Institute (Council of Scientific and Industrial Research), Hyderabad - 500 606, IN
1 Stable Isotope and Surface Geochemical prospecting of Hydrocarbon, National Geophysical Research Institute (Council of Scientific and Industrial Research), Hyderabad - 500 606, IN
2 Stable Isotope and Surface Geochemical Prospecting of Hydrocarbon, National Geophysical Research Institute (Council of Scientific and Industrial Research), Hyderabad - 500 606, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 1 (2009), Pagination: 7-15Abstract
A study was carried out to test the usefulness of surface geochemical methods as regional evaluation tools in petroliferous region of the Mehsana block, North Cambay Basin. A suite of 135 soil samples collected from the depth of 2.5 m, were analyzed for adsorbed light gaseous hydrocarbons and carbon isotopes (δ13Cmethane and δ13Cethane). The light gaseous hydrocarbon analysis show that the concentration ranges 402 ppb, 135 ppb, 70 ppb, 9 ppb and 18 ppb of C1, C2, C3, iC4 and nC4, respectively. The value of carbon isotopic ranges of methane -29.5 to -43.0‰ (PDB) and ethane -19.1 to -20.9‰ (PDB). This data, when mapped, indicates patterns coinciding with major known oil and/or gas field of Sobhasan/Linch in this study area. The existence of un-altered petroliferous microseeps of catagenetic origin is observed in the study area. A regional study, such as the one described here, can provide important exploration facts concerning the regional hydrocarbon potential in a block. This method has been confirmed and can be applied successfully in frontier basins.Keywords
Adsorbed Soil Gas, Light Hydrocarbons, Microseeps, Carbon Isotope, Mehsane Block.
References
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- Assessment of GMean Biological Soil Quality Indices under Conservation Agriculture Practices in Rainfed Alfisol Soils
Abstract Views :205 |
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Authors
K. L. Sharma
1,
Ch. Srinivasa Rao
1,
D. Suma Chandrika
1,
N. Nandini
1,
Munnalal
1,
K. Sammi Reddy
1,
A. K. Indoria
1,
T. Satish Kumar
1
Affiliations
1 Central Research Institute for Dryland Agriculture, Saidabad PO, Santoshnagar, Hyderabad 500 059, IN
1 Central Research Institute for Dryland Agriculture, Saidabad PO, Santoshnagar, Hyderabad 500 059, IN
Source
Current Science, Vol 111, No 8 (2016), Pagination: 1383-1387Abstract
The present study was conducted in 2009-10 with the objective to monitor the effect of restorative soil management practices on biological soil quality. The experiment was initiated in 1995 in a strip-split-split plot design with three replications. Sorghum and castor were grown in two-year rotations. The procedure comprised of two tillage treatments: conventional tillage (CT) and minimum tillage (MT; main plots), three residues treatments: sorghum stover (SS), Gliricidia loppings (GL), no residue (NR; sub-plots), and two nitrogen levels 0 (N0) and 90 kg ha-1 (N90) (sub-subplots). After 15th year of the experiment, activities of the soil enzymes, microbial biomass carbon (MBC), labile carbon (LC) and organic carbon (OC) were studied. Soil management treatments significantly influenced the soil enzyme activities. Enzyme activity was significantly correlated with MBC, LC and OC. The biological soil quality has been assessed in terms of GMeanBSQI (geometric mean of biological soil quality index). From the viewpoint of GMeanBSQI, the order of superiority of soil management treatments was: MT (0.82) > CT (0.69). The performance of the residues was in the order GL (0.87) > SS (0.75) > NR (0.65). Nitrogen @ 90 kg ha-1 (0.81) proved superior to no nitrogen (N0 - 0.70). Among all the treatment combinations, MTGLN90 was found to be the most superior management option for ensuring higher GMean in rainfed Alfisol soils. The present study indicates that crop residue management under minimum tillage is of great significance in improving the biological soil quality indicators and indices. The results obtained are significant in improving biological soil quality index and crop productivity through appropriate soil management.Keywords
Biological Soil Quality, Crop Yield, Labile Carbon Pools, Soil Enzyme Activity, Soil Management.Full Text
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