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Kasthuri Thilagam, V.
- Clay Dispersion Induced by Changes in Some Soil Properties in Undulating Salt-Affected Landscapes of Southern Karnataka, India
Abstract Views :256 |
PDF Views:100
Authors
K. Rajan
1,
A. Natarajan
2,
V. Kasthuri Thilagam
1,
K. S. Anil Kumar
2,
D. Dinesh
1,
N. M. Alam
3,
O. P. S. Khola
1,
R. C. Gowda
4
Affiliations
1 ICAR-Indian Institute of Soil and Water Conservation, Research Centre, Udhagamandalam 643 004, IN
2 ICAR-National Bureau of Soil Survey and Land Use Planning, Hebbal, Bengaluru 560 024, IN
3 ICAR-Indian Institute of Soil and Water Conservation, 218, Kaulagarh Road, Dehradun 248 195, IN
4 Department of Soil Science and Agricultural Chemistry, GKVK, University of Agricultural Sciences, Bengaluru 560 065, IN
1 ICAR-Indian Institute of Soil and Water Conservation, Research Centre, Udhagamandalam 643 004, IN
2 ICAR-National Bureau of Soil Survey and Land Use Planning, Hebbal, Bengaluru 560 024, IN
3 ICAR-Indian Institute of Soil and Water Conservation, 218, Kaulagarh Road, Dehradun 248 195, IN
4 Department of Soil Science and Agricultural Chemistry, GKVK, University of Agricultural Sciences, Bengaluru 560 065, IN
Source
Current Science, Vol 110, No 5 (2016), Pagination: 874-883Abstract
Effect of sodicity on clay dispersion in salt-affected black soils of the Kabini canal command area in Chamrajnagar district, southern Karnataka was studied. Forty-eight soil samples were collected from nine soil profiles and analysed for physical and chemical properties. The clay dispersion ranged from 0.57% to 62.1%. High positive and negative correlations with exchangeable sodium and exchangeable calcium respectively, with clay dispersion were recorded, which can be predicted better with exchangeable sodium and available soil water. Based on clay dispersion value, 2%, 27% and 71% soils are dispersive, intermediate dispersive and non-dispersive respectively. Based on exchangeable sodium percentage, 50, 21 and 29 soils are dispersive, intermediate dispersive and nondispersive respectively. Application of gypsum and organics reduces the clay dispersion in surface soil. Sub-surface drainage will be more effective. Construction of soil and water conservation structures with pile foundation; providing cement lining for soil stabilization in normal construction; providing drainage lines for the structures; construction after refilling with non-dispersive soil will save the structures in salt-affected soils.Keywords
Clay Dispersion, Sodicity, Sub-Surface Effect, Surface Effect.- Nationwide Soil Erosion Assessment in India Using Radioisotope Tracers 137Cs and 210Pb:The Need for Fallout Mapping
Abstract Views :267 |
PDF Views:126
Authors
M. Sankar
1,
S. M. Green
2,
P. K. Mishra
1,
J. T. C. Snoalv
2,
N. K. Sharma
1,
K. Karthikeyan
3,
J. Somasundaram
4,
D. M. Kadam
1,
D. Dinesh
5,
Suresh Kumar
6,
V. Kasthuri Thilagam
7
Affiliations
1 ICAR-Indian Institute of Soil and Water Conservation, Dehradun - 248 195, IN
2 College of Life and Environmental Science, University of Exeter, Exeter, EX4 4RJ, GB
3 ICAR-National Bureau of Soil Survey and Land Use Planning, Nagpur - 440 033, IN
4 ICAR-Indian Institute of Soil Science, Nabibagh, Bhopal - 462 038, IN
5 ICAR- Indian Institute of Soil and Water Conservation, Research Centre, Vasad, Anand - 388 306, IN
6 ISRO-Indian Institute of Remote Sensing, Dehradun - 248 001, IN
7 ICAR-Indian Institute of Soil and Water Conservation, Research Centre, Udhagamandalam - 643 004, IN
1 ICAR-Indian Institute of Soil and Water Conservation, Dehradun - 248 195, IN
2 College of Life and Environmental Science, University of Exeter, Exeter, EX4 4RJ, GB
3 ICAR-National Bureau of Soil Survey and Land Use Planning, Nagpur - 440 033, IN
4 ICAR-Indian Institute of Soil Science, Nabibagh, Bhopal - 462 038, IN
5 ICAR- Indian Institute of Soil and Water Conservation, Research Centre, Vasad, Anand - 388 306, IN
6 ISRO-Indian Institute of Remote Sensing, Dehradun - 248 001, IN
7 ICAR-Indian Institute of Soil and Water Conservation, Research Centre, Udhagamandalam - 643 004, IN
Source
Current Science, Vol 115, No 3 (2018), Pagination: 388-390Abstract
Soil degradation induced by erosion represents a major threat to food production and ecosystem service globally, and in India more than 80 Mha have been impacted. In the light of the serious threat, there is a pressing need for a systematic nationwide assessment of land degradation due to erosion. We discuss the potential for using caesium-137 and lead-210 tracers to address this need and the next steps to realizing nationwide implementation.References
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