Cropping systems experiments are currently being used to evaluate the sustainability of various cotton, systems. An important component is the inclusion of legume crops for grain or green manuring. This, assists in maintaining desirable levels of soil organic matter, with improved soil quality, soil N reserves, and availability of other plant nutrients. Legume cropping provides direct economic benefits to growers, through reduced N fertilizer requirement and indirect long-term benefits through enhanced sustainability, achieved by remediation of soil chemical and physical properties. Management practices which reduce, reliance on chemical fertilizers and which conserve and improve our soil resources are environmentally, responsible and ecologically sound