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Assessment of some soil physical indicators in severely eroded lands of southern Karnataka

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Title Assessment of some soil physical indicators in severely eroded lands of southern Karnataka
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Creator K. Rajan
A. Natarajan
, K.S.AnilKumar ,
R.C.Gowda
Abdul Haris
 
Subject Land degradation, Lateritic soil, Soil erosion, Soil physical indicators
 
Description Not Available
Water erosion is the major type of land degradation in Karnataka affecting 30.9%
geographical area in the state in which Kolar is the most severely affected district
in Southern Karnataka. Remote sensing technique was used to identify the hot
spots. Seven profiles were opened in two transects, one near Jankamakote village
(named as JKT with five profiles) and another one at Bhaktarahalli village (named
as BHT with two profiles) and investigated the impact of water erosion on soil
physical indicators. Pedon 2 of JKT under natural scrub forest recorded highest
infiltration rate and Pedon-3 recorded the lowest infiltration rate because the soil
was crusted and compacted. Highest bulk density (1.7 Mg m ) was observed in
Pedon 4 in JKT. The texture of surface horizons in all the pedons were sandy clay
or sandy clay loam. Available soil water in different Pedons varied from 67.4 to
288.4 mm. Pedon- 4 of JKT retained only 67.4 mm water because of severe
erosion, shallow depth and higher bulk density. Pedon-1 of BHT retained
maximum water (132.1 mm) compared to Pedon-2 (96.1 mm).The highest amount
of micro-aggregates observed under natural forest soil and the least was in
severely eroded lands. Porosity of the soil in different Pedons varied from 33.6 to
44.7%. Clay dispersion in different Pedons ranged from 2.9 to 14.4%. Clay
dispersion was highest in the lowland soil (Pedon-5). The differences in soil
physical qualities at various degrees are attributed to the impact of soil erosion
coupled with incorrect land use. Soil and water conservation measures are highly
needed in sloping areas to restore the soil physical quality.
Not Available
 
Date 2020-03-06T11:39:54Z
2020-03-06T11:39:54Z
2014-04-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/33665
 
Language English
 
Relation Not Available;
 
Publisher Not Available