The measurements were carried out during the last month before harvest time—from mid-September to harvest on 5 October 2007—on 4-year-old ‘Fuji’ apple trees grafted on M9 rootstock grown in the commercial orchard of Sadjarstvo Mirosan (468150N and 158100E) in eastern Slovenia. The experiment included fifteen trees grown under hail nets (double black longitudinal and double(black and green) transverse fibres with mesh size of 6 7 mm) as well as fifteen trees grown in the open. At the beginning of September, we marked the inner, outer and top fruit on each tree and determined following six treatments: