Impact of NPK fertilization on hazelnut yield and soil chemical-microbiological properties of Hazelnut Orchards in Western Georgia

In this study, the effects of ground and foliar applications NPK fertilizers in hazelnut orchards on soil chemical microbiological properties yield were investigated. The fertilization practicesses from done two times using (20:10:10 +trace elements) March May while practices leaf three NK (15:12 May, June July at six different located Samegrelo, Guria Adjara regions Western Georgia 2018. alkaline characterized fertilizer generally increased reaction (pH), nutrient contents EC values magnitude depends characteristics locations. lowest pH (4,40) (0,107 dS m-1) showed highest increment (10,7% 77,6%, respectively) over control. basal respiration Cmic all by ferilization. Increasing also CA DHA activity. mean percent increase parameters obtained as 8,3% yield, 13,3% shelled nut weight, 10,0% kernel weight 5,1% efficiency. value had significant positive correlation with (0,669*), (0,652*) (0,620*) values. improving application characteristic compare farmer or control treatments. increments nutrients are considered a desirable result terms sustainable management plant nutrition for orchards.