Chapter XVIII. Physico-Chemical Investigation of Soils in

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.