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<br />37 <br /> <br />,..... <br />w <br />00 <br />00 <br /> <br />An analysis of variance was conducted to compare the soil <br /> <br />depth means for divides and hillslopes within each basin. Table 5.3 <br /> <br />shows that, in five of the six basins, there is no significant differ- <br /> <br />ence in soil depth between divides and hillslopes at a = .05. The <br /> <br />implication is that the divides and hillslopes have equal rates of soil <br /> <br />development and/or erosion. Perhaps the divides in Basin U are <br /> <br />more erosionally stable than the divides in the other basins, thus <br /> <br />accounting for the soil depth to be significantly greater on the <br /> <br />divides than on the hillslopes. <br /> <br />Table 5.3. Analysis of variance of soil depth for basin divides and <br />basin hillslopes, <br /> <br />HO: <br /> <br />Mean soil depth is the same for basin divides and basin <br />hillslopes within each basin. <br /> <br /> F-ratio Accept or <br />Basin n (calculated) (a=.05) reject HO <br />A 12 0.287 F(1,10)=4.96 accept <br />N 8 0.449 F(1,6)=5.99 accept <br />Q 12 0.0002 F(1,10)=4.96 accept <br />S 15 0.204 F(1,13)=4.67 accept <br />T 16 0.412 F(1,14)=4.60 accept <br />U 12 7.788 F (1,10)=4. 96 reject <br /> <br />In order to determine if soil depths are the same in basins of <br /> <br />the same lithology, the mean soil depths in the shale basins were <br /> <br />compared, as were the mean soil depths in the interbedded shale and <br /> <br />:h <br />