Ibrahim KA, Elsheikh EA, Babiker EE. Minerals Composition of Soybean (Glycine max L.) Seeds as Influenced by Bradyrhizobium Inoculation and Chicken Manure or Sulphur Fertilizatio. Pak. J. Nutr. 2008;7(6):793–800. doi:10.3923/pjn.2008.793.800