Relation to Crop Production. “ XIX. Analysis of Virgin Soils by Extraction with Strong Acids, and its Interpretation. “ XX. Soils of Arid and Humid Regions. “ XXI. Soils of Arid and Humid Regions continued. “ XXII. Alkali Soils, their Nature and Composition. “ XXIII. Utilization and Reclamation of Alkali Lands.
4. SOILS AND NATIVE VEGETATION.
Soils, Their Formation, Properties, Composition, and Relations to Climate and Plant Growth in the Humid and Arid Regions · The Wunder Library — complete classics, free to read, with narration.