It is a combination of factors, but the primary determinants are the mineral composition and the organic and biological content. It's more cost effective, thoug

It is a combination of factors, but the primary determinants are the mineral composition and the organic and biological content. It's more cost effective, though time consuming, to make soil in place than it is to strip mine it and transport it. https://www.nature.com/scitable/knowledge/library/what-are-soils-67647639/ https://www.nature.com/scitable/knowledge/library/what-are-s...