Influence of Distillery Byproducts Along with Farm Yard Manure on Soil Organic Carbon Pools in Rabi Sorghum Crop in Vertisols

The field experiment was laid out to know the “Influence of distillery byproducts along with Farm Yard Manure on soil organic carbon pools in rabi sorghum crop in vertisols at Regional Agricultural Research Station (RARS), Vijayapura, Karnataka, during rabi seasons of 2020-21. The experiment comprising 11 treatments was laid out in recommended complete block design with three replications.The treatments consisting FYM @ 3t ha-1; Pressmud@ 3 t ha-1; Spentwash@ 5ml kg-1 of soil (1:10 dilution spentwash: water); 3 t ha-1 (Spentwash+FYM (1:3 mixing and curing for 25 days)); 3 t ha-1 (Spentwash+Pressmud (1:3 mixing and curing for 25 days)); addition of 100% RDF to above treatments and Absolute control. Result revealed that the highest organic carbon pools (DOC, MBC, LFC and HFC) were recorded when spentwash at 5 ml kg-1 of soil (1:10 spentwash and water dilution) applied in conjunction with recommended dose of fertilizers over all other treatments and similar trends were followed at 24, 48, 72 DAS and after harvest and followed by when combined application of spentwash with FYM and same with pressmud (both the combinations were cured and mixed at 1:3 ratios for 25 days) as compared to applied FYM or pressmud alone. Hence, the application spentwash at 5 ml kg-1 of soil (1:10 spentwash and water dilution) applied in conjunction with recommended dose of fertilizers and combined application of spentwash with FYM and same with pressmud are the best options for dryland agricultural production for enhancing the soil as well as crop productivity.