A Review of Green Manuring Practices in Sugarcane Production

The incorporation of ecological practices into sugarcane production and management has the potential to arrest and ameliorate the negative effects of monocropping on soil degradation and yield decline. Historically, the production of green manures as cover or break crops has been shown to improve the physical, chemical, and biological properties of soil for many crops in production agriculture. This paper examines research outcomes based on the incorporation of green manure practices into sugarcane production throughout the world. Early studies conducted in South Africa revealed the benefits imparted to soil by green manures. More recent research in Australia, Louisiana, Thailand, and Swaziland has shown the use of green manures to improve soil properties and reduce the incidence of disease, with accompanying increases in sugarcane yields. Current investigations conducted by the Joint Yield Decline Venture in Australia indicate that the use of green manure break crops and rotations can result in significant yield increases as a function of improved soil properties. Field and laboratory studies with green manures are currently underway in South Africa to develop strategies for improving soil sustainability and sugarcane yields.