Soils of the Eastern United States and Their Use XIV, Vol. 36
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Produktbeschreibung
Excerpt from Soils of the Eastern United States and Their Use XIV, Vol. 36: The Fargo Clay Loam In the better drained areas it is usually grayish brown or gray or drab, while at greater depths and in localities where the drainage is poor the subsoil is of lighter drab or bluish color. It is a marked characteristic of the Fargo clay loam, wherever it has been encountered, that the subsoil is highly calcareous. A large number of determinations of calcium carbonate have been made in connection with the study of this soil type, and in the majority of cases the calcium carbonate content of the subsoil of the Fargo clay loam has ranged from 3 1/2 to as high as 24 percent. This is unusually high when compared with the lime content of other soils and subsoils. This characteristically calcareous subsoil distinguishes the Fargo clay loam from the black soils of the Clyde series, while the Fargo clay loam is distinguished from the dark-colored soils of the Washburn series, in that the latter contain considerable quantities of stone, while the soils of the Benoit series are underlain by a substratum of gravel. The Fargo clay loam is distinguishable from the Carrington black clay loam through the fact that it occupies the beds of extinct glacial lakes of some size, while the Carrington black clay loam consists of an accumulation of dark-colored surface material overlying glacial till which frequently constitutes the subsoil of that type. Surface Features And Drainage. In all areas where it has been encountered the topography of the Fargo clay loam is marked by the almost level character of the land surface. The slopes within the area of this type are usually not greater than 2 or 3 feet to the mile, while the greater proportion of its area possesses a slope not in excess of 1 foot to the mile. In the areas of its broadest development, such as the Red River Valley of the North, the surface of the Fargo clay loam and of its associated types in the Fargo series is generally so level that one is reminded of the surface of a vast body of water, like the sea. In traveling across such regions the surface of the plain is visible only for a distance of 3 or 4 miles. It is bounded by a straight horizon which seems to rise around the position occupied by the observer like the rim of a saucer. High buildings, such as grain elevators, and the tops of houses and of grain stacks are first visible, and finally the entire structure comes gradually into full view as it is approached. In spite of this almost absolutely level appearance of the surface of the Fargo clay loam, there are minor low undulations and swells interspersed with shallow depressions and broad level areas which give a slight diversity to the surface features of the type, and which aid materially in the natural drainage of a portion of its extent. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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