. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. FURROW IRRIGATION 129 times, and under other systems, they are given small streams for longer periods. 1. Flooding.—Flooding is a method of surface irrigation. The water applied covers the whole surface of a field either as a thin sheet of running water, continued until sufficient water has soaked into the ground, or as a sheet of standing water which is allowed to remain until the soil has absorbed enough. Flooding is usually practiced when the land is not too sloping and when irrigation.
. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. FURROW IRRIGATION 129 times, and under other systems, they are given small streams for longer periods. 1. Flooding.—Flooding is a method of surface irrigation. The water applied covers the whole surface of a field either as a thin sheet of running water, continued until sufficient water has soaked into the ground, or as a sheet of standing water which is allowed to remain until the soil has absorbed enough. Flooding is usually practiced when the land is not too sloping and when irrigation. Fig. 64.—Roosevelt Dam, Salt River, Arizona. One of the big dams of the world. Date of construction, 1905-11. Approximate cost, $10,000,000. Used to irrigate 219,000 acres, j ^U. S. Reclamation Service.) water is abundant. It is commonly done on fields cropped to small grains, alfalfa, and grasses. 2. Furrow Irrigation.—Furrow irrigation is a second method of surface watering. By this method the water is guided over the land in furrows, or channels, which traverse the whole field— the water covering only a part of the soil surface. Furrow irriga- tion is one of the most common methods, and is one of the best for all conditions. When crops like potatoes, corn sorghum and sugar beets are grown, it is usually best to irrigate by the furrow method after the crop is on the ground. This is also the commonly adopted method of all orchard irrigation (Fig. 63). 9. 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
