Soils, their formation, properties, composition, and relations to climate and plant growth in the humid and arid regionsNote 145 — Chapter XX · SOILS OF THE ARID AND HUMID[125] REGIONS.Reading editionAnn. Sci. Agronomique, tome 1, 1899.◇Copy noteReturn to CHAPTER XX. SOILS OF THE ARID AND HUMID[125] REGIONS.