Nutrient cycles for nitrogen (N), phosphorus (P), potassium (K), and sulfur (S) have been adapted from various sources by PPI scientists. They are shown individually through the following links.
This project is a work in progress. Detailed information about each component, input and loss as shown in the four cycles will be developed and expanded as time permits. Revisit this site regularly to watch the dynamic changes being made.
The PowerPoint file of the four nutrient cycles shown above is available here so you can copy it to your local system.
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