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Effect of land shaping on soil properties and crop yield in tsunami inundated coastal soils of Southern Andaman Island

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Title Effect of land shaping on soil properties and crop yield in tsunami inundated coastal soils of Southern Andaman Island
Not Available
 
Creator A. Velmurugan , T.P. Swarnam ,*, Rattan Lal
 
Subject Broad beds and furrow Land degradation Tsunami impact Restoration Ecosystem services
 
Description Not Available
The 2004 Indian Ocean tsunami severely damaged the coastal ecosystems of the Indian islands of
Andaman and Nicobar. Restoring coastal ecosystems and degraded soils of these islands is essential to
provisioning of numerous ecosystem services for the native islanders and ecological functions and
services of these hotspots of biodiversity. Thus, the present study was conducted to assess the impact of
bunding and broad bed and furrow (BBF) systems in restoring the productivity of tsunami inundated
coastal areas of southern Andaman. Bunding of agricultural land leached out the salts by impounding of
rainwater with significant reduction in electrical conductivity (ECe), sodium absorption ratio (SAR), and
exchangeable ions (e.g., Na+, Ca2+ + Mg2+, Cl and SO4
2 ). The BBF system installed in the low lying
waterlogged areas improved the drainage of the beds, harvested rain water (4476 m3 ha 1), prevented
entry of tidal and runoff water into the furrow, and reduced the overall salinity. In addition, microbial
biomass carbon was significantly improved (193–210 mg kg 1soil). Whereas the low lying areas were
inundated during the 20 to 45th standard meteorological week by 25 to 85 cm of water, soils under BBF
systems were adequately drained and had moisture content between
field capacity and the saturation
level. The depth of submergence (R2 = 0.798) and soil salinity (R2 =
0.787) were correlated with the
rainfall amount. Consequently, the BBF systems enabled a higher cropping intensity (218%), increased
fish
production (2.32 Mg ha 1) and water productivity (47.36 Rs m 3) and enhanced employment generation
(213 man days). These land forming interventions must be up scaled to tsunami-affected, low lying areas
of Andaman and elsewhere in southeastern Asia.
Not Available
 
Date 2021-08-03T06:10:47Z
2021-08-03T06:10:47Z
2015-07-07
 
Type Book chapter
 
Identifier A. Velmurugan , T.P. Swarnam ,*, Rattan Lal , 2015, Effect of land shaping on soil properties and crop yield in tsunami inundated coastal soils of Southern Andaman Island
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/52463
 
Language English
 
Relation Not Available;
 
Publisher Elsevier B.V.