During my time searching online, learning about soil, I have encountered the term 'greensand' quite a few times but haven't seen a post on Permies about it. I figured it was about time to change that so here we are! Please feel free to comment your experiences and thoughts on greensand as I am far from an expert on the stuff. I am collecting my thoughts here in this thread and we will see where it goes from here.
Greensand
What is it?
Greensand is generally considered to be glauconite, a marine sediment that contains a variety of trace minerals, silica, and potassium. It is a sand like soil amendment that can help promote drainage in soils. It is considered a long lasting slow release fertilizer of potash and phosphate. The weathering of greensand has been noted to increase the cation exchange capacity in soils by a few online articles. Greensand is utilized in water filtration applications due to it's ability to soften hard water and remove a variety of contaminates. Greensand is viewed as a soil conditioner due to its ability to tighten loose soils and loosen tight soils.
Greensand is produced through mining of deposits and is not considered renewable.
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