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Show CALIFORNIA DEFENDANTS Exhibit No. 1203 Identification: July 12, 1957 Admitted Extract From 1 Etcheverry, Irrigation Practice and Engineering (1st Ed. 1915) (p. 16) On a naturally fertile sandy loam the evapo-transpira-tion amounted to 1,133 pounds per pound of corn; the addition of manure decreased this to 949 pounds, and the addition of 1/10 per cent, sodium nitrate decreased it to 857 pounds. The corresponding transpiration figures were 908, 613, and 585. Similar tank experiments have been carried on by the Irrigation Investigations at the University Farm, Davis, California. The water was applied to the tanks by means of perforated pipes 12 inches below the surface. This method of irrigation nearly eliminates the evaporation loss of soil moisture, as shown by similar experiments made at Riverside, California, which gave for the soil moisture evaporation in 10 days, for bare soil (not shaded), subirrigated at a depth of 12 inches, 6 per cent, of the water applied or a depth of 0.32 inches. The results obtained, therefore, give very nearly the net plant transpiration. The water consumption or plant transpiration for the first season's growth averaged for four cuttings of alfalfa 1,106 pounds per pound of dry alfalfa; during the second growing season the plant transpiration for the four cuttings were: First cut, 497; second, 750; third, 720; fourth, 862; averaging 708. |
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Original book: [State of Arizona, complainant v. State of California, Palo Verde Irrigation District, Coachella Valley County Water District, Metropolitan Water District of Southern California, City of Los Angeles, California, City of San Diego, California, and County of San Diego, California, defendants, United States of America, State of Nevada, State of New Mexico, State of Utah, interveners] : California exhibits. |