Summary box-plots of nematode abundance, Richness, Shannon, and Evenness diversity indexes and Plant Parasitic Index (PPI) derived from results of nematode identification in 92 olive orchards (S1 Table) grouped by the agronomic characteristics of the olive orchards sampled.

<p>(A) Orchard management systems included: A = Wild olives or ‘Acebuches’, O = Organic management; C = Conventional management. (B) Soil management systems included: CC = Conventional management with cover crop, CT = Conventional management with tillage, OC = Organic management with cover crop, and OT = Organic management with tillage. (C) Soil texture. (D) Olive cultivar. The rank-based Kruskall-Wallis test was used to determine differences in all estimated diversity indexes in relation to the different agronomic factors and the resulting probability values are shown. For each agronomic parameter and diversity index, boxes with a different letter indicate significant differences (<i>P</i> < 0.05) according to multiple pairwise comparisons between OMS, SMS, soil texture and olive cultivar levels determined by the Dunn test. (*) ‘Lucentino’ was present in only one orchard and was not included in the statistical analyses.