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Microbial Biomass Carbon Status in Agro-Ecological Sub Regionsof Black Soils in India

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Title Microbial Biomass Carbon Status in Agro-Ecological Sub Regionsof Black Soils in India
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Creator Kulandaivelu Velmourougane • M. V. Venugopalan • T. Bhattacharyya • Dipak Sarkar • D. K. Pal • Apeksha Sahu • P. Chandran • S. K. Ray • Champa Mandal • K. M. Nair • Jagdish Prasad • R. S. Singh • Pramod Tiwary
 
Subject Urease activity Bio-climates Cropping systems Agricultural land use Principal Component Analysis
 
Description Shrink-swell (Vertisols and their intergrades) soils cover an extensive area especially in Peninsular India with smectites as the dominant mineral. It was felt necessary to find out the species of smectites for better management of these soils. Hence, two benchmark Vertisols namely Seloo from Wardha and Saikhindi from Ahmadnagar districts of Maharashtra were chosen for the study. High resolution mineralogical analysis employed through X ray diffraction (XRD) techniques of the silt, total clay and fine clay fractions of both the pedons were carried out along with Greene-Kelly test with only fine clays. Silt (50-2 μm), total clay (
A study was undertaken in the established benchmark soil series in different agro - ecological sub - regions
of Black Soil Regions of India with the objective to assess the urease activity as a function of soil depth, bio - climate, cropping system and land use type. The urease activity declined with increase in soil depth. Maximum activity was restricted within 0–30 cm of soil depth. Cropping systems and bio - climates significantly (p \ 0.01) influenced the urease activity in soil. The average urease activity in different bio - climates was in decreasing order viz. sub - humid (moist)sub - humid (dry)semi - arid (dry) arid. The activity in different cropping systems was in decreasing order viz. legume - sugarcane - cereals - cotton - based cropping system. Higher urease activity was observed in irrigated agro - systems as compared to the rainfed agricultural systems. High management
practices increased urease activity as compared to low management. In physical properties, urease activity was negatively correlated with sand, fine clay, bulk density and available water content. Electrical conductivity, calcium carbonate and cation exchange capacity showed negative correlation in chemical properties at all the soil depths.
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Date 2021-02-19T01:29:26Z
2021-02-19T01:29:26Z
2013-02-12
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/45403
 
Language English
 
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Publisher Springer, The National Academy of Sciences, Allahabad