The influence of urea, boric acid and zinc sulphate on vegetative traits of olive

Abstract

In calcorous soils of Iran, dissolving of nutrient elements especially micronutrients were slow. The objective of this project was to estimate the effect of foliar application of boric acid, zinc sulphate (0, 2000 and 4000 mgL-1) and urea (0, 5000 and 7500 mgL-1) on vegetative traits of olive. Results showed that in first year, the most fresh and dry leaf weight were seen in 2000 boric acid plus urea at 5000 mgL-1. The most leaf area and chlorophyll were observed in boric acid and zinc sulphate at 4000 mgL-1 alone and boric acid at 2000 plus urea at 7500 mgL-1, respectively. In second year, the highest shoot length was seen in zinc sulphate at 4000+boric acid at 2000 plus urea at 5000 mgL-1. The highest no of nodes and leaf area was observed in zinc sulphate at 2000 with boric acid at 4000 mgL-1.