Three rhizobacterial strains i.e., Serratia marcescens, Paenibacillus polymyxa LO 40 or Pseudomonas fluorescens IFO 2034 along with two strains of root nodule bacteria i.e. Bradyrhizobium ARC 408 and ARC 209 were examined in virto for an array of traits that are related to plant growth promoting effects. Three pot experiments carried out to study the rhizomicrobial impacts as plant growth promoting rhizobacteria on the growth and productivity of lupine, roselle and basil plants in sandy soil at Ismailia Experimental Research Station in Ismailia Governorate, ARC. The first experiment conducted...