. Soils, their properties and management . Fiu. 78. — Plan of irrigated farm showing the methods of irrigating dif-ferent crops and the arrangement of the irrigation works for apply-ing the water under the different conditions. 704 SOILS: PROPERTIES AND MANAGEMENT uted from the furrows by percolation and by capillarymovement. Percolation causes the accumulation ofwater under the upper end of the furrows ; capillary move-ment distributes the water laterally as well as downward, £rr 1 0 12 0 tz 34 1 1 ^ ^ 1 1 i c y^ ^ \ ( \ ^^^—i i^^ ^ ^ \^ ^. Fig. 79.^—Diagrams showing the relative rate of move
. Soils, their properties and management . Fiu. 78. — Plan of irrigated farm showing the methods of irrigating dif-ferent crops and the arrangement of the irrigation works for apply-ing the water under the different conditions. 704 SOILS: PROPERTIES AND MANAGEMENT uted from the furrows by percolation and by capillarymovement. Percolation causes the accumulation ofwater under the upper end of the furrows ; capillary move-ment distributes the water laterally as well as downward, £rr 1 0 12 0 tz 34 1 1 ^ ^ 1 1 i c y^ ^ \ ( \ ^^^—i i^^ ^ ^ \^ ^. Fig. 79.^—Diagrams showing the relative rate of movement of waterfrom irrigation furrows into clay loam (left), and sandy loam(right), after different periods of time. and its rate determines the distance between the downward ^ movement is much more rapid than thelateral movement, and both are very irregular, dependingon the nature and structure of the soil. Ordinarily thefurrows are relatively close together, to give greateruniformity in distribution. In corn, potatoes, berries,garden vegetables, and crops of similar character, a furrowis placed in each row, or at least in every other row as is »Widtsoe, J. A., and McLaughlin, W. W. The Movementof Water in Irrigated Soils. Utah Agr. I^^xp. Sta., Bui. 1912. Also, Loughridge, R. II. Distribution of Waterin the Soil in Furrow Irrigation. U. S. D. A., Office Exp. Sta.,Bui. No. 203. 1908. IRRIGATION AND DRY-FARMING 705 sometimes the case in strawberries, in order to permitharvesting. In orchard culture two or more f
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