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Study of variation of soil properties within and between landform in Charilam block, Sepahijala district, Tripura

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Title Study of variation of soil properties within and between landform in Charilam block, Sepahijala district, Tripura
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Creator Reza, S.K., Ray, P., Ramachandran, S., Jena, R., Mukhopadhyay, S., Nayak, D.C., Singh, S.K. and Ray, S.K.
 
Subject variation, soil properties, landform, Charilam block, Sepahijala district, Tripura
 
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Investigation of soil properties within and between landforms help in understanding the dominant pedogenic processes of soil formations. A study was carried out in Charilam block, Sepahijala district, Tripura to understand the major pedogenic processes in four landforms of Purvanchal range having warm to hot perhumid climate using statistical methodologies. Twenty nine profiles were studied from four landformshills, mound, valley and alluvial plain. 119 horizon-wise soil samples were collected and analyzed for 14 soil properties. The major soils in hill were Typic Dustrudepts and Typic Haplustalfs, in mound soils Typic Hapludults, in valley Typic Endoaqualfs and Typic Endoaquepts and in alluvial plain were Fluvaquentic Dystrudepts and Typic Endoaquepts. The analysis of frequency distribution showed that the dataset was highly skewed for most of the soil properties. Before study of soil variability within landforms the landform wise dataset partition and log-transformation were performed. Bulk density (BD), sand, clay and organic carbon (OC) has a normal distribution for the soil samples from each of the four landforms, whereas silt content is normally distributed for the valley and alluvial plain. Concentration of Mg2 and K for all landforms followed the lognormal transformation. However there were some soil properties for which a log transformation did not produce a normal frequency distribution. Soil properties differ significantly among landforms in the study area due to variation in depositional environments and heterogeneous sedimentary parent materials and or differences in pedogenic or hydrologic processes for different landform positions. It appears that the variation in soil properties may have been affected by the imposed drainage and agricultural practices including water stagnation and unjudicious use of fertilizers. For example, OC and exchangeable K data in the alluvial plain deviates from the normal distribution and resulted in larger skewness (positive or negative). The relationship between soil properties within specific landforms was interpreted using the factor analysis which showed that 57%, 55%, 63% and 60% of the variation in the data for the hill, mound, valley and alluvial plain, respectively, was explained by two factors. There are significant positive relationships between K, silt and clay and for hill. Significantly negative relationships were obtained between pH and Al3. Cation exchange capacity (CEC) is most closely related to Ca2, Mg2 and clay content. In mound landform silt, Ca2, Mg2 and CEC are positively correlated and negatively correlated with sand. Also OC is positively correlated with Al3 and are negatively correlated with pH. In alluvial plain CEC is mostly associated with silt and clay content. Most soils in hills and mounds surface soils have high values for sand and OC, with increasing depth the values for clay and CEC increases. This indicates that the pedogenic processes of eluviation and illuviation are prevalent which lead to the formation of argillans in these soils. In alluvial plain majority of soil profiles shows irregular distribution of OC and clay content. Such irregular distribution of soil properties could be attributed to mass movement, periodic flooding and deposition of multiple sources of materials. The study showed that detail knowledge of the soil properties provided crucial information on the pedogenesis of soils of the area which in turn has edaphological significance for the proper management of these soils.
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Date 2020-06-27T01:33:06Z
2020-06-27T01:33:06Z
2018-09-14
 
Type Presentation
 
Identifier Reza, S.K., Ray, P., Ramachandran, S., Jena, R., Mukhopadhyay, S., Nayak, D.C., Singh, S.K. and Ray, S.K. (2018) Study of variation of soil properties within and between landform in Charilam block, Sepahijala district, Tripura. Paper presented at the 21st Annual Convention & the National Conference on “Advances in Clay Science towards Agriculture, Environment and Industry”, Clay Minerals Society of India, New Delhi, 14-15 September, 2018, Kolkata, pp.10-11.
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http://krishi.icar.gov.in/jspui/handle/123456789/37495
 
Language English
 
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Publisher Not Available