The soil biota; Ecology of soil bacteria, cyanobacteria, green algae and fungi; Microbial interactions and survival of the soil microflora; Microbiological processes and nutrient cycling; Root mucilages and their importance in soil; The nature and role of the rhizosphere phenomenon; Processes of nodulation and factors influencing noduldation; Bionitrogen fixation; Mycorrhizas; The importance of soil microflora in farming systems in Ghana; Techniques of soil microbiology.