<https://www.complete-gardening.com/gardening/types-of-substrates-concept-characteristics-natural-and-artificial/#richSnippet>
<http://schema.org/description>
"Substrates are solid materials that serve as a base for plants or animals to live and develop. Their composition is very varied depending on the ecosystem"
<https://www.complete-gardening.com/gardening/types-of-substrates-concept-characteristics-natural-and-artificial/>