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Significance of soil modifiers (Ca-zeolites and gypsum) in naturally degraded Vertisols of the Peninsular India in redefining the sodic soils

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Title Significance of soil modifiers (Ca-zeolites and gypsum) in naturally degraded Vertisols of the Peninsular India in redefining the sodic soils
Not Available
 
Creator Pal, D.K., Bhattacharyya, T., Ray, S.K. et al. et al.
 
Subject Natural degradation; Soil modifiers; Sodicity criteria; Soil classification; Soil management
 
Description Not Available
Earlier hypothesis on the factors and processes of natural degradation in Vertisols and also their evaluation for crops on the basis
of only hydraulic properties was developed on limited soils by the Division of Soil Resource Studies (DSRS) of the National
Bureau of Soil Survey and Land Use Planning (NBSS & LUP), Nagpur, India. In order to validate the above similar soils occurring
in major states of the Peninsular India and also to document the extent of modification by gypsum and Ca-zeolites therein, the
present study on twenty-six benchmark Vertisols representing a climosequence from sub-humid moist to arid dry climate was
undertaken. The results of the present study validates the hypothesis that formation of pedogenic calcium carbonate (PC) at the
expense of non-pedogenic calcium carbonate (NPC) is the prime chemical reaction for the natural chemical degradation realized in
terms of impairment of hydraulic properties of soils mediated through the development of subsoil sodicity. Presence of gypsum and
Ca-zeolites, on the other hand, prevented the rise of pH, decrease in Ca/Mg ratio of exchange sites and improved the hydraulic
properties amidst an exchangeable sodium percentage (ESP) >15. The improvement in saturated hydraulic conductivity (sHC)
(>10mm h−1) of zeolitic sodic soils does commensurate fairly well with the performance of rainy season crops. Thus
characterization of sodic soils in terms of sHC
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Date 2020-05-25T03:11:52Z
2020-05-25T03:11:52Z
2006-05-15
 
Type Research Paper
 
Identifier Pal, D.K., Bhattacharyya, T., Ray, S.K., Chandran, P., Srivastava, P., Durge, S.L. and Bhuse, S.R. (2006). Significance of soil modifiers (Ca-zeolites and gypsum) in naturally degraded Vertisols of the Peninsular India in redefining the sodic soils. Geoderma, 136: 210-228
0016-7061
http://krishi.icar.gov.in/jspui/handle/123456789/36279
 
Language English
 
Relation Not Available;
 
Publisher Elsevier