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Characterization of some cracking clay soils of Rajmahal Trap in Sahibganj District, Jharkhand

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Title Characterization of some cracking clay soils of Rajmahal Trap in Sahibganj District, Jharkhand
 
Creator D. C. NAYAK, SILADITYA BANDYOPADHYAY, A.K. SAHOO, S.K. REZA AND S.K. SINGH
 
Subject Chhotanagpur plateau, Rajmahal trap, Cracking clay soils, Mineral assemblages, Smectite, Vertisols.
 
Description Not Available
Two cracking clay soils of Rajmahal Trap viz., Jetkumarjari and Jirul Series were studied for their
morphological, physical, chemical and mineralogical characteristics. The soils are very deep, somewhat
poor to moderately well drained, silty clay in texture with cracking characteristics indicated by occurrence
of pressure faces at sub surface horizons. They are weakly acidic (pH 6.0) to slightly alkaline (pH 7.6) in
reaction, medium to high CEC (25.8-33.3 (p+
)kg-1
), high base saturation (74-86%) and low EC (0.07-0.36
dSm-1
). Clay mineralogical studies indicated the dominant presence of low charge di-octahedral smectitic
minerals, followed by small amount mica and kaolinite and very small amount of vermiculite. Similarities in
mineral assemblage indicated that both the soils are developed mainly from common source i.e., Rajmahal
Trap. The presence of mica indicates their inheritance from granite-gneiss whereas vermiculite is the weathering product of biotite. Clay minerals other than vermiculite formed in humid climate of earlier geological
period and are preserved in the present day dry climate along with vermiculite. Land resource managers
need to take note of the unique mineralogical make up of the soils for advising the agricultural land use
planning to maintain soil health. Cracking clay soils developed in smectite rich alluvium of the Rajmahal
Trap are of both young and matured in nature as evidenced by their classification. The soils were classified
under the fine, smectitic hyperthermic family of Vertic Endoaquepts and Typic Haplusterts.
Not Available
 
Date 2020-07-01T05:59:21Z
2020-07-01T05:59:21Z
2018-08-01
 
Type Research Paper
 
Identifier Not Available
0255-7193
0255-7193
http://krishi.icar.gov.in/jspui/handle/123456789/37924
 
Language English
 
Relation Not Available;
 
Publisher Clay Research