Combined inoculation of Rhizobium leguminosarum b.v. vicia (ARC 200 L) and "phosphate-solubilizing"; Pseudomonas striata or Bacillus pol-ymyxa with and without added chemical fertilizer on lentil yield and nutri-ent content was stbdied under greenhouse conditions. The single inocu-lation of Rhizohbium increased the nodulation and nitrogenase activity and the "phosphate-solubilizers" increased the available phosphorus con-tent of the soil. Combined inoculation of Rhizobla and Thstriata or B.polympra increased the above parameters and also the dry matter content. Grain yield, and nitrogen and phosphorus uptake significantly in-creased over the uninoculated control. The inoculation effects were more pronounced in the presence of added fertilizers. The possibilities of saving half the dose of N and replacing superphosphate with rock-phosphate and inoculation with "phosphate-solubilizers" are discussed.