Mycorrhiza associations can be described as the symbioses between certain fungi, particularly Vesicular-Arbuscular (VA)-mycorrhizas, and the roots of vascular plants (trees, shrubs & certain plants like wheat, sorghum, cassava, soya, tea & coffee). A VA-mycorrhizal fungus is unspecific, it can infect a very wide range of host plants & it is assumed that more than 90% of all vascular plants are capable of forming mycorrhiza associations. In many circumstances, mycorrhizal infection can greatly increase the rate of uptake of nutrients, particularly phosphorus and nitrogen, from deficient soils. Vesicular-Arbusculas mycorrhizas are known to solubilize iron phosphate in low fertility soils. In addition, they may mobilize other scarce elements like copper, zinc and possibly iron. Utilization of vesicular-arbuscular mycorrhizae (VAM) markedly increases the success of rehabilitation of disturbed & degraded lands, either in mesic or in moisture-deficient zones. It has been demonstrated that the presence of VAM is critical for the regeneration of natural ecosystems in arid lands.