THE 4R NUTRIENT Stewardship Program, spearheaded by Fertilizer Canada, has made significant inroads in Ontario and across Canada.4R is a framework for nutrient management which improves efficiency and increases crop yields and profitability while minimizing nutrient losses. The 4R program recognizes the need to use fertilizer from the right source, at the right rate, right time, and in the right place. However, the framework includes recognition that what is 'right' must take into account the fertilizer products and application technology that is available to farmers, and that choice of practices will need to balance economic, environmental, and social factors.
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