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<br />Hill, G. E., 1982: Evaluation of the Utah operational weather modification program. Final Report, NOAA <br />Contract NA81RACOO023. Atmospheric Water Resources Series UWRL/A-82/02, Utah Water Research <br />Laboratory, Utah State University, Logan, UT, 291 pp. <br /> <br />No abstract. <br /> <br />Hirsch, J. H., 1990: North Dakota Thunderstonn Project-1989 Field Program Data Inventory. Bulletin 89-5. <br />Institute of Atmospheric Sciences, South Dakota School of Mines & Technology, Rapid City, SD, <br />133 PI'. <br /> <br />No abstract. <br /> <br />Hjelmfelt, M. R., H.-Y. Chou, R. D. Farley, and D. L. Priegnitz, 1992: Organization and development of <br />a squall line in North Dakota as revealed by Doppler radar and numerical simulations. Preprints, <br />5th Conference on Mesoscale Processes, Atlanta, GA, January 5-10, 1992. American Meteorological <br />Society, Boston, MA, 221-226. <br /> <br />No abstract. <br /> <br />Hollinger, S. E., and S. A. Changnon, 1992: Studies of effects of increased rainfall in crop production. <br />Preprints, Symposium on Planned and Inadvertent We:ather Modification, Atlanta, GA, January 5-10, <br />1992. American Meteorological Society, Boston, MA, 80-83. <br /> <br />No abstract. <br /> <br />Hollinger, S. E., and S. A. Changnon, 1991: Response of com yield components to simulated precipitation <br />augmentation. Preprints, 20th Conference on Agricultural and Forest Meteorology, Salt Lake City, UT, <br />September 10-13, 1991. American Meteorological Society, Boston, MA, 17-20. <br /> <br />No abstract. <br /> <br />Hollinger, S. E., and S. A. Changnon, 1991: Response of com yield components to simulated precipitation <br />augmentation. Journal of Weather Modification, 23:45-48. <br /> <br />Mobile rain shelters were used to protect corn (Zea Mavs L.) from all natural rainfall during the <br />summers of 1987, 1988, 1989 while providing water to the crop through an overhead sprinkler system <br />mounted in the rain shelters. Water was applied to the crop to simulate typical dry, normal, and wet <br />summers in cenltrallllinois. Final yields were measw~ed at harvest along with the various yield <br />components (number of kemel rows/ear, number of kemels/row, total number of kemels/ear, kemel <br />mass) that determine final yield. Yields were increased in each of the typical summers by increased <br />rainfall. The greatest benefit of the increased rainfall was realized at pollination and the two weeks <br />following pollination as expressed by an increase in the number of kemels/fertile ear. Neither the <br />number of kernel TOws/fertile ear nor the fmal mass of the kemels were affected by the rainfall <br />treatments. In addition to larger fertile ears, some yic~ld increase was realized by a reduction in the <br />number of barren plants in the plant population under higher rainfall treatments. <br /> <br />41 <br />