Table 3-4. Results of mixed model analysis testing the effects of plant age, fertilization, and the number of worker ants on the proportion of leaf area missing. The number of ants was logio-transformed and the proportion of leaf area missing was logit-transformed to improve the distribution for this analysis. Source of variation num. df den. df Plant age 3.90 4.98 Fertilization No. ants 1 103 7.54 0.096 0.067 0.0071