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Collaborating Scientists within Institutions Principal Investigator Dr. S.P.Wani, ICRISAT

Identifying systems for carbon sequestration and increased productivity in semi-arid tropical environments. ICRISAT CCPI: Dr. T.J.Rego Dr. K.P.C. Rao Mr. P. Pathak Dr. Piara Singh. NBSS & LUP Dr. Tapas Bhattacharyya Dr. P. Chandran DR. S.K. Ray Dr. (Mrs.) C. Mandal Dr. D.K. Pal

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Collaborating Scientists within Institutions Principal Investigator Dr. S.P.Wani, ICRISAT

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  1. Identifying systems for carbon sequestration and increased productivity in semi-arid tropical environments

  2. ICRISAT CCPI: Dr. T.J.Rego Dr. K.P.C. Rao Mr. P. Pathak Dr. Piara Singh NBSS & LUP Dr. Tapas Bhattacharyya Dr. P. Chandran DR. S.K. Ray Dr. (Mrs.) C. Mandal Dr. D.K. Pal Dr. M.V. Venugopalan Mr. S.L. Durge Dr. P. Srivastava Collaborating Scientists within InstitutionsPrincipal InvestigatorDr. S.P.Wani,ICRISAT CRIDA Dr. V. Ramesh Dr. K.L. Sharma DR. M. Vanaja IISS Dr. M.C. Manna Dr. K. Bandyopadhyay DR. T.R. Rupa

  3. Objectives • Identify the potential carbon sequestration production systems in the SAT benchmark sites and establish relationship amongst different factor with the carbon stock and systems productivity. • Evaluate validate the existing simulation models for predicting the performance of different systems for carbon sequestration.

  4. NBSS & LUP MINEROLOGY OF CLAY + SILT SMECTITE QUANTITY BULK DENSITY PARTICLE SIZE DENSITY STRUCTURE HC COLE pH CEC Org. C EC Extractable Cations Inorganic C CaCO3 CO2 Clay Site characteristics IISS WSA WSC WS Carbon POM Passive pools DHA Available P Responsibilities of participating institutions for soil sample analysis CRIDA • Available S • Total P reading • Total S reading • Meteorological • Agronomic • Infiltration • Respiration ICRISAT • WHC • Organic C • Total P • SMBC • SMBN • Respiration • Net N mineralisation • Total N • Available N • Plant C & N

  5. Work ProgramModule 1Methodology and requirements definitionModule 2Resource inventory/database developmentModule 3 Assessing carbon stock/balanceModule 4 Processes related to C sequestration

  6. Module 5 Modeling requirementsModule 6 Model adaptation and validationModule 7Identification of promising practicesModule 8Techno-economic feasibility of new strategies

  7. Progress • Benchmark sites identified (17 sites covering 32 spots) • Site characteristics and information on soils and management practices collected for each site • Soil samples collected (horizon wise) for analysis of physico-chemical and biological properties

  8. Work carried out for following Parameters • Moisture retention characteristics • Mean weight diameter(MWD) • Particle size distribution • Water dispersable clay • Carbonate clay • Coefficient of linear extensibility • Hydraulic Conductivity • Bulk density • Soil reaction, EC • Calcium carbonate • Cation exchange capacity

  9. Total Carbon • Soil organic Carbon • Fractions of soil Carbon • Mineral N • Total N • Available P • Total P • Available S • Activity of Dehydrogenase • Microbial biomass C and N • Soil respiration • Net N

  10. Modeling work • Identified CENTURY model to assess carbon stocks at all locations targeted by this project • Identified APSIM and DSSAT crop growth models to assess the changes in soil productivity associated with changes in soil carbon • Work on calibration of century model initiated Response of crops to elevated CO2 under controlled conditions Cereals, pulses and oilseed crop germination experiments under elevated CO2 conditions to assess the performance of different rainfed crops and quantify the soil respiration rates

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