ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
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of this may be the high correlation between the variables n and θ. The inclusion in<br />
the regression equation (69) the additional variables (ie introducing more degrees<br />
of freedom), apart of the soil water content, θ, can only decrease the value of p<br />
parameter. The lower p F , the goodness of fit in multiple regressions is better.<br />
Table 13. The results of multiple regression analysis for individual groups of soil<br />
No. regression<br />
parameter<br />
a 0 a 1<br />
(θ)<br />
a 2<br />
(ρ)<br />
a 3<br />
(φ)<br />
a 4<br />
(ρ s )<br />
a 5<br />
(C)<br />
Mineral soils (395 cases)<br />
a 6<br />
(clay)<br />
p F R 2 S yx<br />
a i 1.422 8.976 – – – – –