2.5. Leaf mineral analysis and deviation from optimum
percentage (DOP index)
Leaf macro- and micronutrients content were determined at
120 DAFB in 2011 and 2012. Leaf samples were collected from
middle part of 1-year-old shoots of the evaluated cultivar trees
under different fertilisers treatment. Freshly collected leaves were
washed with tap-water and then with distilled water within 24 h
of sampling. After air-drying, the samples were oven dried at 70 .C