Soils, their formation, properties, composition, and relations to climate and plant growth in the humid and arid regionsNote 53 — Chapter VIII · SOIL AND SUBSOIL.Reading editionBull. No. 53, Minn. Exp’t Station, p. 12, Chem. of Soils and Fertilizers, p. 94.◇Copy noteReturn to CHAPTER VIII. SOIL AND SUBSOIL.