Older, filled in ponds provide an excellent soil amendment. The
pond can be cleaned out with a digger and this choice material
should be set aside until the very end. Once your other
earthworks are complete this material can be scattered on top as an excellent soil amendment. It can also be used in gardens, on
trees, or any where else you wish to improve the soil.
When water is in deep narrow creeks it is cold and dense. This kind of water carries material, such as silt and organic matter. When the water reaches the wide plane of a pond or other water basin the water warms and unwinds. This causes the water to drop whatever sediment it is carrying. Water gathers humus, organic matter, and silt from the narrow creeks and deposits it in the ponds. Additionally, water is the most productive growing medium. The Algae - Zoe-plankton systems that develop in natural ponds are the fastest generators of soil on the planet.
Judith, Johnny, Zach, and Team HolzerAgroEcology