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<br />ratio for the 1979-1993 time period, as compared to no cloud seeding in the control area <br />for the same time period. Ratio R2 reflects differences in hail-damage loss cost ratios <br />between the target and control area for the 1948-1970 time period, during which no cloud <br />seeding occurred. <br /> <br />The following conclusions may result from this analysis: <br /> <br />1) <br /> <br />DR = 1 <br /> <br />This result would imply that the cloud seeding operations have had <br />no effect on hail damage to crops in the target area. <br /> <br />2) <br /> <br />DR < 1 <br /> <br />This result would imply that the cloud seeding operations may <br />have been effective in reducing hail damage in the target area. <br /> <br />3) <br /> <br />DR> 1 <br /> <br />This result. would imply that the cloud seeding operations may <br />have qused an increase in hail damage in the target area. <br /> <br />Hail SUDDression Evaluation Results <br /> <br />The effectiveness of the cloud seeding operation in suppressing hail damage was <br />measured by using a hail-damage loss cost ratio analysis, as described above where the <br />loss cost ratio is defmed below: <br /> <br />Loss cost ratio = <br /> <br />insured crop hail-damage loss <br />insured crop hail-damage liability <br /> <br />x 100 <br /> <br />The results of the analysis of crop hail data are presented in Table 2. For the cloud <br />, <br />seeding time period of 1979-1993, the ratio RI = (3.77/5.55) = 0.68 is an indication <br />that the magnitude of crop hail damage is less in the target area than in the control area, <br />since the ratio is less than one. However, there was very little difference in the <br />magnitude of crop hail damage between the target and control areas in the pre-seeding <br />time period of 1948-1970, as the ratio Rz = (7.57/8.11) = 0.93 is close to 1.00. The <br />double ratio DR = Rl / Rz = 0.68/0.93 = 0.73 leads to the conclusion that the cloud <br />seeding operations appear to have been effective in reducing hail damage in the target <br />area. The estimated percentage ofreduction in crop-hail damage is (1 - 0.73) x 100 = <br />27 percent for the 1979-1993 time period in the six county target area. <br /> <br />Economic Sirnificance <br /> <br />A determination of practical economic significance was calculated beIow and was based <br />on the results of the double ratio analysis shown above and utilized the crop values <br />published in the Kansas Board of Agriculture's FARM FACTS publication series. <br /> <br />Step I: <br /> <br />A = the total 1979-1993 crop value in the six county target area <br />= $4,l96,675,514 <br /> <br />15 <br />