Soils, their formation, properties, composition, and relations to climate and plant growth in the humid and arid regionsNote 113 — Chapter XVIII · THE PHYSICO-CHEMICAL INVESTIGATION OF SOILS IN RELATION TO CROP PRODUCTION.Reading editionProc. Ass’n Prom. Agr. Sci. 1904.◇Copy noteReturn to CHAPTER XVIII. THE PHYSICO-CHEMICAL INVESTIGATION OF SOILS IN RELATION TO CROP PRODUCTION.