National Research Council. 1972. Soils of the Humid Tropics. Washington, DC: The National Academies Press. https://doi.org/10.17226/20485.
|Physical Properties of Soils||50-62|
|Soil Nitrogen and Organic Matter||63-81|
|Soil Phosphorus and Sulfur||82-101|
|Soil Acidity and Liming||136-149|
|Soil Silicon and Plant Nutrition||163-173|
|Soil Management Systems||189-197|
|Soil Testing and Soil Fertility Evaluation Services||198-202|
|Appendix: Summaries of Country and Regional Reports||203-214|
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