The farming systems of West Africa and problems of maintenance of soil fertility.
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| Format: | Texto biblioteca |
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1964
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| Subjects: | FAO UNICEF, SOIL FERTILITY, CULTURAL METHODS, HUMAN NUTRITION, FERTILITE DU SOL, MODE DE CULTURE, FERTILIDAD DEL SUELO, METODOS DE CULTIVO, NUTRITION HUMAINE, NUTRICION HUMANA, |
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