Vegetative growth of walnut nursery plants as affected by foliar nutrition

The effect of foliar fertilization on vegetative growth of walnut nursery plants was observed in this experiment. The experiments were conducted at the Fruit Research Institute, Čačak (Serbia), over 2003-2005. The study involved one cultivar (cv Seinovo - control) and four selections of walnut, including Ovcar, G-286, Elit and G-139. The trial included two variants: variant I - without foliar fertilization (control), and variant II - with foliar fertilization. Vegetative growth of walnut plants in the foliar feltilization variant was higher at the end of the first (16,9 cm) and second (207,8 cm) growing seasons as compared with the control variant (14,3 cm and 171,6 cm, respectively). The highest plant growth was observed in selection G-286 at the end of the first (17.1 cm) and cv Seinovo at the end of second (197.8 cm) growing seasons, and the lowest in selection G-139 (14.8 cm and 182.3 cm, respectively).