Does anyone know of any sources for nutrient facts on Hugelkultur? I'm looking for things like grams of nitrogen/potassium released per year per kg of Hugel matter. All I can seem to find is anecdotal evidence such as it provides long term fertility. The reason for wanting to know some hard facts is I'm designing a closed food growing space for a contaminated site and want to close the fertility loop as much as possible. Knowing how much a given amount of Hugel matter will contribute would be very helpful when calculating the nutrient budget.
