This book gives an insight into the association of VAM with mesquite tress (Prosopis juliflora) and Rhizobial association. The diversity of VAM associated with VAM is documented. Rhizobial strain is isolated from the mesquite trees. The researchers may find it useful on techniques to observe in situ developing vesicles, arbuscules and spores. Photomicrograph of different species and genera of VAM has been documented. The information contained in this book is novel and informative for any researchers and students.