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Plant diseases are a major constraint to productivity in rainfed agricultural systems. This chapter examines the nature of diseases in cropping systems, thresholds for management, major management tools, integrated disease management and the challenges for translating knowledge into practice. Inputs for disease management should be based on well-defined thresholds, but these are poorly developed for...
Principles of hazard based safety engineering involve the study of the sources and mechanisms of injury in order to best protect against it. This approach is used to support risk assessment, with various stages to identify, analyze and evaluate risk, and to reduce risk as needed.
Imagine a world in which luggage never comes, Fido remains lost, forgeries cannot be distinguished from the genuine, a gallon of petrol in one gas station is not equivalent to a gallon in another, tainted peanut products cannot be recalled and disease runs rife. Without the ability to trace, one may anticipate such a world. Tracing is one of the oldest skills possessed by the human race and was vital...
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