Out of 81 isolated bacteria from salt pan of CSIR-CSMCRI's experimental salt farm with salinity range from 10 to 24 Be', one of the promising bacterial strain identified as Acinetobacter soli showed potassium solubilizing potential of 66-68% (w/w) w.r.t cell dry weight. It was further optimized with cost effective carbon source for K release in the broth itself which was 10.67% of K (with respect to the K-feldspar present in the broth) utilizing sugarcane baggase hydrolysate with production age of 120 h. (C) 2016 Elsevier B.V. All rights reserved.