In fertilization experiments in a lake in Ontario, which of the following nutrients were shown to have the greatest limitation on productivity?

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Phosphorus was shown to have the greatest limitation on productivity in the fertilization experiments. This is because phosphorus is often the limiting nutrient in freshwater systems, as it is less abundant than nitrogen and carbon, which are more easily taken up by primary producers. Limiting nutrients are those that are in short supply and therefore limit the growth and productivity of organisms in an ecosystem.

In Fertilization Experiments in a Lake in Ontario, Which of the Following