title: Response of symbiotic interrelationship between soybean and the indigenous or inoculated microsymbiont,Bradyrhizobium japonicum, to soil application of manganese and molybdenum.
abstract: Soybean nodulation was induced indigenously by three strains ofBradyrhizobium japonicum inoculated in each of the two previous seasons. The same strains were applied, as a peat-based inoculum in similar cell density as the indigenous ones, to a rhizobia-free soll from the same field. Inoculation was tested under soll application of 10 or 20 ppm Mn and/or 2 or 4 ppm Mo. Inoculation with the peat-based inoculum significantly increased nodule numbers and weight, dry weight, N content and mg N/g of the 50-day-old plants, number of pods and seeds per plant, seed yield, seed N content and percentage, and mg N/g of the empty pods. Increasing the application of Mn and Mo fed to further increases. There was a complex response of nodulation, vegetative growth and yield to the applications of Mn and Mo.
authors.affiliation: Sakha Agricultural Research Station, Kafr El-Sheikh, Egypt.
authors.forename: Y G
authors.initials: YG
authors.lastname: Yanni