. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. 116 LAND DRAINAGE AND IRRIGATION Good open ditches do not afford complete underdrainage except for a few yards on either side of them. In order to secure thorough underdrainage through the use of open ditches, they must. Fig. 50.—A good outlet ditch. I'lns was dug with a floating dredge. It is 20 feet wide at the top and 7 feet deep. (Wisconsin Station.) be dug about every four or eight rods; but many open ditches take up considerable space, they cut farms and fields into incon- venient an
. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. 116 LAND DRAINAGE AND IRRIGATION Good open ditches do not afford complete underdrainage except for a few yards on either side of them. In order to secure thorough underdrainage through the use of open ditches, they must. Fig. 50.—A good outlet ditch. I'lns was dug with a floating dredge. It is 20 feet wide at the top and 7 feet deep. (Wisconsin Station.) be dug about every four or eight rods; but many open ditches take up considerable space, they cut farms and fields into incon- venient and irregular shapes, they require the building of many. 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 Weir, Wilbert Walter, 1882-. Philadelphia London, J. B. Lippincott company
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsoils, bookyear1920
