. Elements of agriculture; a text book for public schools. Agriculture. 208 ELEMENTS OF AGRICULTURE. grading machine leaves the road bed rough, lumpy, and uneven, and it should-be followed by a disc har- row or pulverizer, which will cut the lumps into fine, workable pieces. After the clods are reduced, a re- versible road grader in the hands of an expert will form the bed into any shape desired. Avoid Steep Grades. The load which can be car- ried is measured by the steepest hill, and one short grade of a few hundred yards may reduce the load which can be hauled for ten miles one-fourth in wei
. Elements of agriculture; a text book for public schools. Agriculture. 208 ELEMENTS OF AGRICULTURE. grading machine leaves the road bed rough, lumpy, and uneven, and it should-be followed by a disc har- row or pulverizer, which will cut the lumps into fine, workable pieces. After the clods are reduced, a re- versible road grader in the hands of an expert will form the bed into any shape desired. Avoid Steep Grades. The load which can be car- ried is measured by the steepest hill, and one short grade of a few hundred yards may reduce the load which can be hauled for ten miles one-fourth in weight. Where a rise of more than seven feet in one hundred occurs, it should be cut down by the use of the wheeled or slush grader. Cutting at the crest of the hill, and depositing the dirt at the foot of the slope, will reduce the grade, and, while it is a slow process, compared with the work that can be done with large grading machines, it is the best-known method for carrying dirt from one point in the road- bed to another some distance away. Road Drainage. A form of construction which will avoid standing water is the chief secret in maintain--^^^ ing a good road. Furrows or i ditches along each side of the roadbed furnish dirt to build a roimded surface for vehicles to pass over, and, in addition, ^ Fig. 72. Subdiain made serve to carry the water away with flew stones. to the natural ravines and rivers which form the final outlets for all the extra surface water that falls. Tile Drains. Tile drains beneath the surface 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 Shepperd, J[ohn] H. [from old catalog]; McDowell, John Chambers, 1867- [from old catalog] joint author. St. Paul, Minn. , Webb publishing company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagriculture, bookyear
