. Agriculture, its fundamental principles. Agriculture. THE SOIL 15 a mass of ice many hundreds of feet thick. It extended from the Arctic regions southward to central Pennsylvania and from New England to the Rocky Mountains, covering two thirds of North America. The glacier moved far more slowly than does water, but its grinding and transporting power was much greater. It wore down hills and filled up valleys. Like a giant millstone, it ground rocks to powder. At last it melted, depositing a layer of A ^ Glacier The ice-mass is darkened by soil and rock waste. The rounded peb
. Agriculture, its fundamental principles. Agriculture. THE SOIL 15 a mass of ice many hundreds of feet thick. It extended from the Arctic regions southward to central Pennsylvania and from New England to the Rocky Mountains, covering two thirds of North America. The glacier moved far more slowly than does water, but its grinding and transporting power was much greater. It wore down hills and filled up valleys. Like a giant millstone, it ground rocks to powder. At last it melted, depositing a layer of A ^ Glacier The ice-mass is darkened by soil and rock waste. The rounded pebbles and rocks have been transported hundreds of miles and deposited by the melting glacier. Soils of the United States. —The underlying surface rock of the northern part of the United States is chiefly sandstone; had the soil been formed from this, it would have been thin and poor. The soil formed by the glacial deposit is usually deep and fertile, being formed by the grinding and mixing of a variety of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Soule, Andrew MacNairn. [from old catalog]; Turpin, Edna Henry Lee, 1867-1952, joint author. Richmond, Atlanta [etc. ] B. F. Johnson publishing company
Size: 2012px × 1241px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectagriculture, bookyear
