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Changing the pH of arable soil Recurso multimedia: Ilustración
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Chemical elements that make up black soil Recurso multimedia: Ilustración
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Effects of artificial fertilizers Recurso multimedia: Vídeo
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Energy pollution Versión del alumno
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Equation for the liming of soil Recurso multimedia: Ilustración
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Exploitation of natural resources Recurso multimedia: Actividad
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Fertility of soils and water bodies Recurso multimedia: Presentación
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Fertility of the soil Recurso multimedia: Presentación
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Formation of mineral waters Recurso multimedia: Vídeo
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Frequency polygon Versión del alumno
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Geotropism Recurso multimedia: Vídeo
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Heat pollution Recurso multimedia: Actividad
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Inorganic fertilizers Versión del alumno
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Recursos: 26 – 50 Total: 155

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