Foliar Sprays of Citric Acid and Malic Acid Modify Growth, Flowering, and Root to Shoot Ratio of Gazania (Gazania rigens L.): A Comparative Analysis by ANOVA and Structural Equations Modeling

Figure 1

The path analysis of experimental data. Dashed lines indicate negative coefficients, and the width of the arrow indicates the strength of the effect. The lines represent significant effect and the numbers on arrows are standardized regression coefficients (when factor goes up or down by 1 standard deviation, the variable goes up or down by the multiplying the mentioned number in its standard deviation). The numbers on the upper corner of each variable are determination coefficient () (e.g., it is estimated that the predictors of the root dry weight explain 52 percent of its variance). Variation due to error is not included for simplicity.