Indiana Code Title 25. Professions and Occupations § 25-31.5-1-9

Sec. 9. “Soil” means the unconsolidated mineral or organic matter on the surface of the earth that has been subjected to and influenced by genetic and environmental factors of parent material, climate (including water and temperature effects), microorganisms, and topography, all acting over time and producing a product that differs from the material from which it is derived in many physical, chemical, biological, and morphological properties and characteristics.