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Soil erosion and pollution /

The soil is the brown layer that wraps our planet. This is the more or less crumbly mass which manages the plant roots. Formed soil can be several feet thick or thin just a few inches. However, only the top layer of 10-30 cm is made ??up of fertile topsoil. If our Earth would one day run out of the...

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Detalles Bibliográficos
Clasificación:TD878 S7.44
Autor principal: Stille, Darlene R
Formato: Libro
Idioma:Español
Inglés
Publicado: Chicago : Children,Press, ©1990.
Colección:A New True Book
Temas:
Descripción
Sumario:The soil is the brown layer that wraps our planet. This is the more or less crumbly mass which manages the plant roots. Formed soil can be several feet thick or thin just a few inches. However, only the top layer of 10-30 cm is made ??up of fertile topsoil. If our Earth would one day run out of the topsoil, then our little world would again become a dead star.
Descripción Física:44 p. : il., laminas a color. ; 22 cm.
Bibliografía:Incluye índice.
ISBN:051601188-x