In-situ evaluation of internal drainage in layered soils (Tukulu - hessd
In-situ evaluation of internal drainage in layered soils (Tukulu - hessd
In-situ evaluation of internal drainage in layered soils (Tukulu - hessd
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Table 5. Homogeneity test for the three <strong>soils</strong> horizons.<br />
Bartletts test Regression coefficient<br />
Soil types Computed χ2 Tabular χ2 Computed F Tabular F<br />
(α; 0.05,2) (α; 0.05,2) (α; 0.05,2)<br />
<strong>Tukulu</strong> 19.36 5.99 27.71 3.16<br />
Sepane 26.75 5.99 51.99 3.16<br />
Swartland 32.46 5.99 119.29 3.16<br />
9827<br />
Table 6. Student’s t-test for differences between horizons K -θ regression coefficients.<br />
Soil type Horizons Pooled variance Tabulated variance (α; 0.05)<br />
<strong>Tukulu</strong> AB 1.714 ns<br />
2.032<br />
BC 9.905 2.032<br />
AC 5.092 2.032<br />
Sepane AB 14.558 2.032<br />
BC 0.841 ns<br />
2.032<br />
AC 6.121 2.032<br />
Swartland AB 0.336 ns<br />
2.032<br />
BC 18.584 2.032<br />
AC 10.729 2.032<br />
ns = not significantly different at 95 % confidence <strong>in</strong>terval.<br />
9828<br />
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