. 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. Pij A canvas dam in use. (Farm- Bui. 392, U. S. Dept. of Agr.) low, flat levees, or ridges. Into these checks the water is turned. On level ground these sections or checks may be made rec- tangular; but on sloping ground the ditch for sup- plying the water must fol- low the contour lines, in which case they are said to be contour checks. In applying the water, an opening is made from the ditch into the side
. 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. Pij A canvas dam in use. (Farm- Bui. 392, U. S. Dept. of Agr.) low, flat levees, or ridges. Into these checks the water is turned. On level ground these sections or checks may be made rec- tangular; but on sloping ground the ditch for sup- plying the water must fol- low the contour lines, in which case they are said to be contour checks. In applying the water, an opening is made from the ditch into the side of each check and the water allowed to flow in until each is covered to the desired depth. Where the check method is followed, it is customary to have small wooden outlets from the ditch into the checks, with. Fig. 73. Check method of irrigation. U. S. Dept. of Agr.) (Sep. 514,. 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
