Figure 1.

The annual fruit production (A) and canopy volume (B) per tree are compared to the annual fruit production (C) and hedgerow surface and volume per hectare (D), both as functions of the olive tree density for the cultivar “Arbequina.” Lines represent linear regression of the variables A, B, C, and D over tree density. The points represent the average values per olive tree or surface area of orchard over 14 years. Nine tree densities ranging from 780 to 2254 trees ha⁻¹ were evaluated in this study.