The New Encyclopaedia Britannica: A - K.Encyclopaedia Britannica, 1997 |
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Page 190
... soil . There are two major soil types of high fertility that are continuous over large areas . In the dry northeastern inte- rior , leaching has been retarded and many of the original nutrients remain ; however , these soils require ...
... soil . There are two major soil types of high fertility that are continuous over large areas . In the dry northeastern inte- rior , leaching has been retarded and many of the original nutrients remain ; however , these soils require ...
Page 693
... Soils are commonly reddish to brown and rich in clay . They vary in fertility , and in many areas crops can be grown continuously only if fertilizers are applied . On poorer soils , a shifting subsistence agriculture is practiced ...
... Soils are commonly reddish to brown and rich in clay . They vary in fertility , and in many areas crops can be grown continuously only if fertilizers are applied . On poorer soils , a shifting subsistence agriculture is practiced ...
Page 945
... Soils . Soil is a thin veneer that forms a discontinuous cover on the land areas of the Earth . Its volume and its mass are small in comparison to the major geospheres , but it is of vast importance to man . Superficially it might be ...
... Soils . Soil is a thin veneer that forms a discontinuous cover on the land areas of the Earth . Its volume and its mass are small in comparison to the major geospheres , but it is of vast importance to man . Superficially it might be ...
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