"Bibliographie." . . "Sols Régions tropicales Régions tropicales." . . "Soils Tropics." . . "Pédologie." . . "Bodenkunde." . . . . . . "Soil: its origin and formation. The physical properties of soil. The chemical properties of soil: the mineral portion. The chemical propertires of soils: organic matter and humus. The availability of soil nutrients. Green manuring and composting. Cultivation. Soil erosion and drainage. The maintenance of fertility. Fertilisers and their use. Field experiments." . . . . "Soil: its origin and formation; Physical properties of soil; Chemical properties of soil: the mineral portion and organic matter and humus; The availability of soil nutrients; Green manuring and composting; Cultivation; Soil erosion and drainage; The maintenance of fertility; Fertilizers and their use; Field experiments." . . . . . . . "Tropical soil science"@en . . . . . . . . . . . . "Soil: its origin and formation; The physical properties of soil; The chemical properties of soil: the mineral portion; The chemical properties of soil: organic matter and humus; Green manuring and composting; Cultivation; Soil erosion and drainage; Fertilisers and their use; Field experiments." . "Elements of soil science"@en . . . . . . . . . . . . . . "Elements of tropical soil science" . "Elements of tropical soil science"@en . . . . . . . . . . . . . . . . "Elements of Tropical Soil Science"@en . . . . . . . . . "Soil: its origin and formation; The physical propwerties of soil; The chemical properties of soil: the mineral portion; The chemical properties of soil: organic matter and humus; The availability of soil nutrients; Green manuring and compusting; Cultivation; Soil erosion and drainage; The maintenance of fertility; Fertilisers and their use; Field experiments." . . . . . . "Bibliografie." . . "Agriculture Régions tropicales." . . "Agriculture - Régions tropicales." . "Sols Régions tropicales." . . "Macmillan Company." . . . . "Tropen." . . "Tropics" . . "Soils." . . "Soils" .