Wikipedia:WikiProject Soil/Soil Directory Structure

Soil Directory Structure
Category:Soil is the default category for project articles. Categorical hierarchies:
 * Category:Earth sciences>>>Category:Human geography>Category:Land use>Category:Agriculture>Category:Soil
 * Category:Matter>Category:Materials>Category:Natural materials>Category:Soil
 * Category:Applied sciences>Category:Agriculture>Category:Soil
 * Category:Nature>Category:Natural resources>Category:Soil

Possible sub-categories of Category:Soil:
 * Category:Soil management
 * Category:Types of soil
 * Category:U. S. state soils (ala Commons:Category:U.S._state_soil)