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<br />
<br />Analysis. Thus, operation time, discharge rate, and irrigated acreage were measured
<br />at approximately 450 randomly selected irrigation wells within 10 areas of the High
<br />Plains during the 1980 irrigation season. The data were used to estimate the seasonal
<br />mean application of water to crops and to project total pumpage by irrigation
<br />wells in 1980 throughout the High Plains area. As part of the sampling effort, 50
<br />irrigation wells were randomly chosen from the area of eastern Laramie County,
<br />Wyoming, and Kimball County, Nebraska. Required information was collected on
<br />only 40 of the wells. For these wells, the seasonal mean application of water on the
<br />irrigated land was 15.2 inches. For the major crop types, the seasonal mean
<br />application, in inches, were as follows: alfalfa, 19.8; corn, 15.4; potatoes, 13.8; beans,
<br />12.8; and small grains 10.2.
<br />
<br />59. Avery, e., and Pettijohn, R.A., 1984, Generalized potentiometric- surface map of the High Plains
<br />Aquifer in Wyoming, 1981: U.s. Geological Survey Water-Resources Investigations Report 84-
<br />4033, 1 sheet.
<br />
<br />60. Babb, e.e., Hinderlider, M.e., and Hoyt, j.e., 1906, Report of progress of stream measurements
<br />for the year 1905: U.s. Geological Survey Water-Supply Paper 172, 283 p.
<br />
<br />61. Babcock, H.M., and Bjorklund, L.j., 1956, Ground-water geology of parts of Laramie and Albany
<br />Counties, Wyoming, and Weld County, Colorado: U.s. Geological Survey Water-Supply Paper
<br />1367,61 p.
<br />
<br />62. [lain, H.F., 1901, Milling practice at Idaho Springs: Eng. Min. J, v. 72, p. 425-426.
<br />
<br />63. Baker, V.R., 1984, Flood sedimentation in bedrock fluvial systems,;/1 E. H. Koster and R. J. Steel,
<br />eds., International Association of Sedimentologists 11th congress; Sedimentology of gravels
<br />and conglomerates. Memoir: v. 10, Canadian Society of Petroleum Geologists, p. 87-98.
<br />
<br />64. Baker, V.R., 1974, Paleohydraulic interpretation of Quaternary alluvium nearGolden,Colorado:
<br />Quat. Res., v. Quat. Res. Cent 4, no. 1, p. 94-112.
<br />
<br />65. Baker, V.R., 1973, Paleosol development in Quaternary alluvium near Golden, Colorado: Mt.
<br />Geologist, v. 10, no. 4, p. 127-133.
<br />
<br />66. Ball, H.J., 1983, Aldrin and dieldrin residues in Nebraska soils as related to decreasing LD
<br />sub(50) values for the adult western corn rootworm -1962-1981: J. Environ. Sci. Health, Part B,
<br />v. B18, no. 6.
<br />
<br />Aldrin was recommended and used to control the western corn rootworm (D;abrot;ca
<br />v;rgifem (LeConte)) (WCR) in Nebraska from 1952 to 1961. During that period, LD
<br />sub(50) values for adult WCR tested against aldrin were determined for 19 collection
<br />sites in Nebraska. Mean 24 h LD sub(50) values for these sites decreased from 1,539
<br />mu g/ g in 1962 to 355 mu g/ g for 1981. A correlation existed between the amount of
<br />aldrin used for soil treatments and the aldrin and dieldrin residues, with decreasing
<br />LD sub(50) values for the WCR over the observation period.
<br />
<br />20 Bibliography 01 Water-Related Studies, South PlaUe River Basin--Colorado, Nebraska, and Wyoming
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