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Organic carbon forms in Alfisol profile after Twenty Years of Cropping, Fertilization, Groundnut Shells and Farm Yard Manure Addition under Arid Conditions

author(s) Srinivasa Rao, Ch - Wani, S P - Venkateswarlu, B - Vittal, K P R - Vijayasankarbabu, M - Yellamanda Reddy, T - Kundu, S
from International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)
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Srinivasa Rao, Ch and Wani, S P and Venkateswarlu, B and Vittal, K P R and Vijayasankarbabu, M and Yellamanda Reddy, T and Kundu, S (2007) Organic carbon forms in Alfisol profile after Twenty Years of Cropping, Fertilization, Groundnut Shells and Farm Yard Manure Addition under Arid Conditions. In: Proceedings of International Symposium on Organic Matter Dynamics in Agro-Ecosystems., 16th to 19th July 2007, Poitiers, France
Organic carbon forms in Alfisol profile after Twenty Years of Cropping, Fertilization, Groundnut Shells and Farm Yard Manure Addition under Arid Conditions

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Abstract

The objectives of this study were to examine ;he effects of 20 years of groundnut cropping with chemical fertilization (NPK), organic manuring (FYM or groundnut shells) and integrated use of these two inputs (INM) on crop yields, soil organic carbon (SOC), particulate organic carbon (POC) and microbial biomass carbon (MBC) in an Alfisol under arid conditions. VariollS nutrient managcment options significantly «0.05) improved yield of groundnut pod over 20 years. The SOC improved significantly in surface layer (0-20 cm) from 0.31 % in control to 0.59 % in 50 % NPK + 4 t FYM ha

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