Soil properties at broiler grow-out farm location associated with probabilities of detecting Salmonella in the samples and drags swabs of litter in screening analyses (n = 76)a.

aThe associations established after accounting for random variability among the broiler farms, complexes and companies, and farm latitude.bVariable with a marginal significance (p≤0.150) in the screening step retained for further analysis.cSoil natural drainage rate classes: Somewhat Excessive (15.2–50.8 cm per hour)–5; Well (5.1–15.2 cm per hour)–4, Moderately Well (1.5–5.1 cm per hour)–3, Somewhat Poor (0.5–1.5 cm per hour)–2, and Poor (0.2–0.5 cm per hour)–1.dProportion of soil map unit components with perched water table classes: 75–100% of components with perched and the rest with apparent water table–class 5, 50–74% of components with perched and the rest with apparent water table–class 4, equal percentages (50%/50%) of components with perched and apparent water tables–class 3, 50–74% of components with apparent and the rest with perched water table–class 2, 75–100% of components with apparent and the rest with perched water table–class 1.eSoils suitability to produce the habitat for particular vegetation or wildlife rating: good-4, fair-3, poor-2, and very poor-1.fSee Results of analyses for individual soil properties for how the ratings of soils' suitability to produce the habitat for particular vegetation or wildlife were converted into dichotomous variables.