. Agricultural engineering; a text book for students of secondary schools of agriculture, colleges offering a general course in the subject and the general reader. Agricultural engineering. DRAINAGE 87 top of the ditch will be about one foot from the line of grade stakes. A straight ditch indicates good workmanship. To secure straightness, a small rope may be stretched along the line of the ditch. Curves may be laid out by using the rope as a radius and marking numerous points along the line of curve by short stakes. The tools required for digging ditches by hand are not numerous. A ditching s
. Agricultural engineering; a text book for students of secondary schools of agriculture, colleges offering a general course in the subject and the general reader. Agricultural engineering. DRAINAGE 87 top of the ditch will be about one foot from the line of grade stakes. A straight ditch indicates good workmanship. To secure straightness, a small rope may be stretched along the line of the ditch. Curves may be laid out by using the rope as a radius and marking numerous points along the line of curve by short stakes. The tools required for digging ditches by hand are not numerous. A ditching spade with a 16- to 20-inch blade is most generally used. In muck soils, an open three-tanged spade will be more satisfactory. To clean out the loose soil from the bottom of the ditch, a long-handled round-nosed shovel is the most efficient tool. To take out the last bit of soil and to shave the bottom of the ditch down to an even grade to receive the tile, a tiler's scoop, or crumber, is neces- sary. Ditching Machines. Owing to the large amount of labor involved in digging tile ditches by hand, attempts have been made for years to design a machine which would do the work successfully. At the present time there are some machines. masm :"*'"~ -;' Fig. 51. A tile ditching machine at 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 Davidson, Jay Brownlee, 1880-1957. St. Paul, Minn. , Webb Pub. Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagricul, bookyear1919
