The nature and properties of soils

Incluye table of contents

1. A fundamental conception of the soil -- 2. The supply and availability of plant nutrients in mineral soils -- 3. The soil particles and the physical nature of mineral soils -- 4. The organisms in the soil -- 5. The organic matter of mineral soils -- 6. The methods of fertility maintenance for mineral soils -- 7. The formation of mineral soils and the origin of soil materials -- 8. Classification of soils and the soil survey -- 9. The nature and utilization of otganic soils -- 10. Forms of soil-water and their significant physical -- 11. The plant relationships of soil-water and metrods for its control -- 12. Water as solvent-the soil solution and its nutrient losses -- 13. The soil reaction, soil acidity and alkalinity -- 14. Liming the soil -- 15. The nitrogen economy of soil -- 16. The notrogen economy of soils.