. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 36 BULLETIN 512, IT. S. DEPARTMENT OF AGRICULTURE. 15 to 20 feet in width. Then, commencing at the center again, the strip is plowed in the same manner as before. This procedure is repeated until the terrace has reached the desired height. Many farmers allow the loose earth to be settled by a rain between plowings so that the dirt will turn better. However, it is safer to build the terrace to the desired height at the start for, if a heavy rain, sufficient to overtop the terrace, comes between plowings, much of the ori
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 36 BULLETIN 512, IT. S. DEPARTMENT OF AGRICULTURE. 15 to 20 feet in width. Then, commencing at the center again, the strip is plowed in the same manner as before. This procedure is repeated until the terrace has reached the desired height. Many farmers allow the loose earth to be settled by a rain between plowings so that the dirt will turn better. However, it is safer to build the terrace to the desired height at the start for, if a heavy rain, sufficient to overtop the terrace, comes between plowings, much of the original work is undone and considerable damage occurs from erosion. A disk plow can be used successfully to throw up loose dirt, and the ordinaiy road grader is employed often and is adapted especially to such work. The most commonly used and cheapest implement for throwing up a terrace is a wooden, V-shaped drag. Plate VI, figure 2, and Plate VII, figure 1, show two terrace drags that have been used satisfactorily. Figure 17 shows a terrace drag with Z"'</l"'c8' Fig. 17.—A terrace drag. After the first three or four furrows have been plowed on each side of the center line of the terrace, the drag is used to push the loose earth toward the center and thus build the terrace higher. The plowing is resumed and the drag used again, and this is done i-epeatedly until the terrace has attained the desired width. If the terrace is not built sufficiently high the first time, the work is started again at the center and the plowing and dragging are repeated. The longer side of the drag is hinged so that for the first few furrows the hinged portion is allowed to swing loose. As the terrace increases in width, and it is desired to move the loose earth a greater dis- tance, the removable brace is set in position and the hinged portion is brought into use. The short side of the drag is made to follow the o]')en furrow; this holds the drag in the proper position. The
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