"Soil types" refers to different categories or kinds of soil found in various areas, which have distinct characteristics such as texture, structure, drainage, composition, and fertility. Full definition
This paper provides a more complete description of the variation in size, density and attributes of fairy circles in a range of soil types and situations. (journals.plos.org)
The research will involve measurements of phosphorus and nitrogen across different soil types. (newscenter.lbl.gov)
The response of these covered systems to abandonment depends upon a complex suite of issues including soil type, length of time in pasture or cultivation, and the type of the original ecosystems. (usask.ca)