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Slides from a presentation on this topic at the Ontario Golf Superintendents Conference.
This presentation looks at nutrient availability, specifically at how we can ensure the grass is supplied with enough nutrients while at the same time ensuring that excess nutrients are not being applied. This involves an integrated look at plant use of nutrients, at fertilizer application, at soil nutrient levels, and leaf nutrient content. Healthy turfgrass plants are the goal, and those plants have a known concentration of nutrients in the leaves. By estimating the amount of nutrients that are harvested when the leaves are cut, and relating that to the amount of nutrients in the soil, one can make an informed judgement on whether or not an element is required as fertilizer, and if so, just how much is required.