Detailed study of rhizosphere (soil surrounding roots) and phyllosphere (leaf surface) as microbial habitats. Covers rhizosphere microorganisms (bacteria, fungi, actinomycetes), factors affecting microbial populations (root proximity, temperature, soil type, plant age), rhizosphere-to-soil ratio (RS ratio), plant growth promotion mechanisms, phyllosphere microorganisms, and biocontrol agents including nitrogen-fixing and phosphate-solubilizing microbes.
