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Water Retention Curves for Turface

Does anyone have a link to a study that shows a water retention curve for Turface? Here is what such a curve looks like for Peat:

What is important to measure in such a graph is the percentage of water originally held in the substrate that is available to the plant. For peat, roughly 50% of the moisture is released to the plant before the substrate tightly holds onto the remaining water, right around 5 kPa.

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